We studied 14 presolar SiC mainstream grains for C-, Si-, and S-isotopic compositions and S elemental abundances. Ten grains have low levels of S contamination and CI chondrite-normalized S/Si ratios between 2 × 10−5 and 2 × 10−4. All grains have S-isotopic compositions compatible within 2σ of solar values. Their mean S isotope composition deviates from solar by at most a few percent, and is consistent with values observed for the carbon star IRC+10216, believed to be a representative source star of the grains, and the interstellar medium. The isotopic data are also consistent with stellar model predictions of low-mass asymptotic giant branch (AGB) stars. In a δ33S versus δ34S plot the data fit along a line with a slope of 1.8 ± 0.7, suggesting imprints from galactic chemical evolution. The observed S abundances are lower than expected from equilibrium condensation of CaS in solid solution with SiC under pressure and temperature conditions inferred from the abundances of more ...

Neutrino astronomy is the branch of astronomy that observes astronomical objects with neutrino detectors in special observatories. Neutrinos are created as a result of certain types of radioactive decay, or nuclear reactions such as those that take place in the Sun, in nuclear reactors, or when cosmic rays hit atoms. Due to their weak interactions with matter, neutrinos offer a unique opportunity to observe processes that are inaccessible to optical telescopes. Neutrinos were first recorded in 1956 by Clyde Cowan and Frederick Reines from a nuclear reactor. Their discovery was acknowledged with a Nobel Prize for physics in 1995. In 1968, Raymond Davis, Jr. and John N. Bahcall successfully detected the first solar neutrinos in the Homestake experiment. Davis, along with Japanese physicist Masatoshi Koshiba were jointly awarded half of the 2002 Nobel Prize in Physics for pioneering contributions to astrophysics, in particular for the detection of cosmic neutrinos (the other half went to Riccardo ...

Wednesday, 7 October. At todays presentation ceremony of The Shaw Prize at the Hong Kong Convention and Exhibition Centre, The Honourable Donald Tsang, Chief Executive of the HKSAR, Peoples Republic of China accompanied by Mr Run Run Shaw, Patron of the Prize, presented the awards to the five Laureates. (Information about the Laureates is attached.). After several months of deliberation, the international prize committee selected the Shaw Laureates and announced the results at the press conference on 16 June 2009.. Details of this years Shaw Laureates are as follows:. The Shaw Prize in Astronomy - awarded to Professor Frank H Shu Distinguished Research Fellow of Academia Sinica, Taiwan in recognition of his outstanding life-time contributions in theoretical astronomy.. The Shaw Prize in Life Science and Medicine - awarded jointly to Professor Douglas L Coleman, Senior Staff Scientist, Emeritus of The Jackson Laboratory, Maine, USA and Professor Jeffrey M Friedman, Marilyn M Simpson Professor ...

Then he found the ratio of terrestrial planets to all the planets seen. Again, remember, this ratio was found for planets somewhat close in to their stars.. Then he plotted all the planets versus distance from their parent stars. For example, you see very few planets very close to the star (probably because its hard to form or get a planet to orbit that close in), then more as you get farther out, then fewer at some large distance (which may, once again, simply be due to the fact that planets with long orbital periods cant be seen in the short duration of the data). He then found an equation (called a mathematical fit) that did a good job predicting the shape of the plot. Once he had that, its easy enough to extrapolate it out to the distance of the habitable zones of the stars.. That gave him an estimate of all planets orbiting there, including gas and ice giants. Multiply by the ratio of terrestrial planets, and boom! 34% of stars like the Sun should have planets that are Earth-sized ...

Tuesday, 9 September. At todays presentation ceremony of The Shaw Prize at the Hong Kong Convention and Exhibition Centre,the Honourable Donald Tsang Yam-Kuen, Chief Executive of the HKSAR, Peoples Republic of China accompanied by Mr Run Run Shaw, Patron of the Prize, presented the awards to the six Laureates. (Information about the Laureates is attached.). After several months of deliberation, the international prize committee selected the Shaw Laureates and announced the results at the press conference on 10 June 2008.. Details of this years Shaw Laureates are as follows:. The Shaw Prize in Astronomy - awarded to Professor Reinhard Genzel, Director of Max Planck Institute for Extraterrestrial Physics, Germany, in recognition of his outstanding contributions in demonstrating that the Milky Way contains a supermassive black hole at its centre. ...

Objects of the universe from the earth to galaxies. How the universal laws that govern them; e.g., gravity and electromagnetic radiation, permit us to learn their nature from quantitative observations. Telescopic observations, visual and electronic, included in the laboratory.. ...

the Cornell synchrotron radiation facility, and Brookhaven National Laboratory.. Laboratory for Surface Modification. The Laboratory for Surface Modification is an interdisciplinary laboratory with state-of-the art equipment, involving over twenty faculty members from different departments (Physics & Astronomy, Chemistry and Chemical Biology, Materials Science and Engineering, Electrical and Computer Engineering, Chemical and Biochemical Engineering, and Biomedical Engineering). The focus of LSM is on the physics, chemistry and engineering of surfaces and interfaces, often at the atomic scale. The facility is centered in the Nanophysics Laboratory (NPL) adjacent to Serin Physics Laboratory, and is directed by Professor Robert Bartynski. Aside from the considerable conceptual interest in this area, progress in surface and interface science is having an impact on such diverse fields as electronic materials, petrochemistry, computer science, biomedical science, and nanotechnology. Professor Eva ...

Dr. Sean Oughton obtained his Ph.D. degree in 1993 in space and plasma physics under the supervision of Prof. William H. Matthaeus. The topic of his Ph.D. thesis was Transport of Solar Wind Fluctuations: A Turbulence Approach. He is currently Associate Professor of Applied Mathematics at the University of Waikato in New Zealand.. ...

Dr. Dominik Maximilian Juraschek is joining the faculty of the School of Physics and Astronomy as a Senior Lecturer in October 2021. He studies hidden states of matter that can be induced in quantum materials through dynamical and in particular vibrational (phononic) processes. Dr. Juraschek uses a combination of computational and theoretical methods to describe nonlinear dynamics of the crystal lattice in a broad range of solid-state systems, including complex oxides, van der Waals materials, and low-dimensional dielectrics and magnets.. Research achievements include: Prediction of various nonlinear phononic excitation mechanisms that have subsequently been verified experimentally; prediction of the existence of phonon magnetic moments as a result of dynamical multiferroicity; creation of a theoretical framework for coherent coupling of phonons and magnetism (phono-magnetism).. Future directions include: Expanding the theory of nonlinear phononics as a basis for dynamical materials ...

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The Shaw Prize was established under the auspices of Mr Run Run Shaw in November 2002 to honour individuals, regardless of race, nationality, gender and religious belief, who have recently achieved significant breakthrough in academic and scientific research or applications and whose work has resulted in a positive and profound impact on mankind. The Shaw Prize consists of three annual prizes: Astronomy, Life Science and Medicine, and Mathematical Sciences. The monetary award for each prize has been increased from US$1 million to US$1.2 million starting from this year. This is the thirteenth year that the Prize has been awarded ...

The Shaw Prize was established under the auspices of Mr Run Run Shaw in November 2002 to honour individuals, regardless of race, nationality, gender and religious belief, who have recently achieved significant breakthrough in academic and scientific research or applications and whose work has resulted in a positive and profound impact on mankind. The Shaw Prize consists of three annual prizes: Astronomy, Life Science and Medicine, and Mathematical Sciences. The monetary award for each prize has been increased from US$1 million to US$1.2 million starting from this year. This is the thirteenth year that the Prize has been awarded ...

In the following article Ill go through the most important astronomy gadgets and equipments to have in your stargazing arsenal. These gadgets will improve the quality of your hobby and could open up entirely new areas to explore.

GALAXY S5 MINI, GALAXY S6, GALAXY S6 EDGE, ATIV ODYSSEY, GALAXY LIGHT, TOUCH 3, GALAXY NOTE 10.1, GALAXY TAB S 10.5, GALAXY TAB S 8.4, GALAXY TAB 4 10.1, GALAXY NOTE PRO 12.2, GALAXY TAB 2 10.1, GALAXY NOTE 10.1 2014, GALAXY NOTE LTE 10.1, GALAXY TAB 3 7.0, GALAXY TAB 4 8.0, GALAXY NOTE 4, GALAXY GRAND PRIME, GALAXY S6 ACTIVE, GALAXY J1, GALAXY NOTE 5, GALAXY S6 EDGE PLUS, GALAXY TAB A 8.0, GALAXY TAB A 9.7, GALAXY TAB 3 V, GALAXY TAB E 9.6, GALAXY TAB E 8.0, GALAXY TAB E 10.1, GALAXY S7, GALAXY S7 EDGE, GALAXY J3 2016, GALAXY J3V, GALAXY EXPRESS PRIME, GALAXY TAB S2 9.7, CONVOY 4, GALAXY EXPRESS PRIME, GALAXY AMP PRIME, GALAXY EXPRESS 3, GALAXY AMP 2, GALAXY J7 2016, GALAXY S7 ACTIVE, GALAXY ON5, GALAXY TAB E, GALAXY J3 EMERGE, GALAXY S8, GALAXY S8 PLUS, GALAXY J7 V, GALAXY J7 PERX, GALAXY EXPRESS PRIME 2, GALAXY EXPRESS PRIME 2, GALAXY AMP PRIME 2, GALAXY J3 PRIME, GALAXY J3 ECLIPSE, GALAXY J3 2017, GALAXY J7 PRIME, GALAXY BOOK 12 LTE, GALAXY J3 MISSION, GALAXY J7 2017, GALAXY TAB S3, GALAXY ...

GALAXY S5 MINI, GALAXY S6, GALAXY S6 EDGE, ATIV ODYSSEY, GALAXY LIGHT, TOUCH 3, GALAXY NOTE 10.1, GALAXY TAB S 10.5, GALAXY TAB S 8.4, GALAXY TAB 4 10.1, GALAXY NOTE PRO 12.2, GALAXY TAB 2 10.1, GALAXY NOTE 10.1 2014, GALAXY NOTE LTE 10.1, GALAXY TAB 3 7.0, GALAXY TAB 4 8.0, GALAXY NOTE 4, GALAXY GRAND PRIME, GALAXY S6 ACTIVE, GALAXY J1, GALAXY NOTE 5, GALAXY S6 EDGE PLUS, GALAXY TAB A 8.0, GALAXY TAB A 9.7, GALAXY TAB 3 V, GALAXY TAB E 9.6, GALAXY TAB E 8.0, GALAXY TAB E 10.1, GALAXY S7, GALAXY S7 EDGE, GALAXY J3 2016, GALAXY J3V, GALAXY EXPRESS PRIME, GALAXY TAB S2 9.7, CONVOY 4, GALAXY EXPRESS PRIME, GALAXY AMP PRIME, GALAXY EXPRESS 3, GALAXY AMP 2, GALAXY J7 2016, GALAXY S7 ACTIVE, GALAXY ON5, GALAXY TAB E, GALAXY J3 EMERGE, GALAXY S8, GALAXY S8 PLUS, GALAXY J7 V, GALAXY J7 PERX, GALAXY EXPRESS PRIME 2, GALAXY EXPRESS PRIME 2, GALAXY AMP PRIME 2, GALAXY J3 PRIME, GALAXY J3 ECLIPSE, GALAXY J3 2017, GALAXY J7 PRIME, GALAXY BOOK 12 LTE, GALAXY J3 MISSION, GALAXY J7 2017, GALAXY TAB S3, GALAXY ...

TY - JOUR. T1 - Constraining phosphorus chemistry in carbon- and oxygen-rich circumstellar envelopes. T2 - Observations of PN, HCP, and CP. AU - Milam, S. N.. AU - Halfen, D. T.. AU - Tenenbaum, E. D.. AU - Apponi, A. J.. AU - Woolf, N. J.. AU - Ziurys, L. M.. PY - 2008/9/1. Y1 - 2008/9/1. N2 - Millimeter-wave observations of PN, CP, and HCP have been carried out toward circumstellar envelopes of evolved stars using the Arizona Radio Observatory (ARO). HCP and PN have been identified in the carbon-rich source CRL 2688 via observations at 1 mm using the Submillimeter Telescope (SMT) and 2-3 mm with the Kitt Peak 12 m. An identical set of measurements were carried out toward IRC +10216, as well as observations of CP at 1 mm. PN was also observed toward VY Canis Majoris (VY CMa), an oxygen-rich supergiant star. The PN and HCP line profiles in CRL 2688 and IRC +10216 are roughly flat topped, indicating unresolved, optically thin emission; CP, in contrast, has a distinct U shape in IRC +10216. ...

In the interstellar medium - the space between the stars in galaxies - new stars are born from material that is replenished by the debris ejected by stars when they die. This book is a comprehensive manual for studying the collisional and radiative processes observed in the interstellar medium. This second edition has been thoroughly updated and extended to cover related topics in radiation theory. It considers the chemistry of the interstellar medium both at the present epoch and in the early Universe, and discusses the physics and chemistry of shock waves. The methods of calculation of the rates of collisional excitation of interstellar molecules and atoms are explained, emphasising the quantum mechanical method. This book will be ideal for researchers involved in the interstellar medium and star formation, and physical chemists specialising in collision theory or in the measurement of the rates of collision processes.. • Comprehensive manual for studying collisional and radiative processes ...

Corundum mineral information page at mineralminers.com: your on-line link for corundum scientific facts and corundum mineralogical information - all about natural corundum - with links to all varieties of natural corundum as well information on worldwide corundum mining locations and background info for each corundum variety regarding corundum physical properties, corundum geologic occurance, corundum metaphysical information and uses of corundum, and the history of corundum.

PHYS 150, Physics: Dr. Coutrakon: Section 1. PHYS 151, Physics Laboratory: Dr. Coutrakon. PHYS 162, Online, Elementary Astronomy: Dr. Hedin: Section 1. PHYS 162, Elementary Astronomy: Dr. Zutshi: Section 2. PHYS 162, Elementary Astronomy: Dr. Hedin: Section H1. PHYS 180, Acoustics, Music, and Hearing: Dr. Ito. PHYS 210, General Physics I: Dr. Brown. PHYS 211, General Physics II: Dr. Adelman. PHYS 252, Intermediate General Physics: Dr. Van Veenendaal. PHYS 253, Fundamentals of Physics I: Mechanics: Dr. Chmaissem. PHYS 253H, Fundamentals of Physics I: Mechanics: Dr. Chmaissem. PHYS 253, Fundamentals of Physics I: Mechanics (TLC): Dr. Eads. PHYS 253, Fundamentals of Physics I: Mechanics (TLC): Dr. Coutrakon. PHYS 273, Fundamentals of Physics II: Electromagnetism: Dr. Van Veenendaal. PHYS 283, Fundamentals of Physics III: Quantum Physics: Dr. Lurio. PHYS 284, Quantum Physics Laboratory: Dr. Lurio. PHYS 300, Analytical Mechanics I: Dr. Dabrowski. PHYS 320, Thermodynamics and Statistical Physics: Dr. ...

The interplay between inflows and outflows of gas around galaxies has wide-ranging implications for galaxy evolution. We present results for a serendipitous background / foreground galaxy pair based on HST/WFC3 imaging, Keck/HIRES spectroscopy, and GALEX--Spitzer/IRAC photometry. The background galaxy is a massive (stellar mass 1011 solar masses) post-starburst galaxy at z=0.71 with an extremely compact morphology (effective radius 0.15 kpc) and an extreme outflow (velocity -2500 km/s) traced by Mg I, Mg II, Fe II, and Mn II absorption lines. The depth of the Mg II absorption lines show that the outflowing gas covers the entire galaxy at v -2500 km/s with additional optically thick, smaller covering factor gas extending to -3000 km/s. These results suggest a picture where a recent, highly dissipative merger event formed a compact starburst that launched an energetic, galaxy-wide outflow. The foreground object is an L* disk galaxy at z=0.41 for which we detect Mg II and Fe II absorption lines at ...

TY - JOUR. T1 - Star formation in nearby early-type galaxies. T2 - Mapping in UV, optical and CO. AU - Bureau, M.. AU - Bacon, R.. AU - Cappellari, M.. AU - Combes, F.. AU - Davies, R. L.. AU - De Zeeuw, P. T.. AU - Emsellem, E.. AU - Falcn-Barroso, J.. AU - Jeong, H.. AU - Krajnovi, D.. AU - Kuntschner, H.. AU - McDermid, R. M.. AU - Peletier, R. F.. AU - Sarzi, M.. AU - Shapiro, K. L.. AU - Van De Ven, G.. AU - Yi, S. K.. AU - Young, L. M.. N1 - Copyright: Copyright 2007 Elsevier B.V., All rights reserved.. PY - 2006/8. Y1 - 2006/8. N2 - The SAURON integral-field survey reveals that small (∼0.1,Re) kinematically decoupled cores (KDCs) in early-type galaxies are increasingly young toward the center and are typically found in fast-rotating galaxies, while large KDCs (∼0.5 Re) have homogeneously old stars and are present in non-rotating galaxies (McDermid et al. 2006). GALEX UV imaging further allows the direct identification of regions of recent star formation (0.5 Gyr). In NGC 2974 for ...

ADC_Keywords: Stars, S ; Mass loss ; Masers ; Photometry, infrared Keywords: stars: mass-loss - stars: AGB - stars: late-type - infrared: stars - radio lines: stars Abstract: It is the purpose of this paper to rediscuss the circumstellar properties of S stars and to put these properties in perspective with our current understanding of the evolutionary status of S stars, in particular the intrinsic/extrinsic dichotomy. This dichotomy states that only Tc-rich (intrinsic) S stars are genuine thermally-pulsing asymptotic giant branch stars, possibly involved in the M-S-C evolutionary sequence. Tc-poor S stars are referred to as extrinsic S stars, because they are the cooler analogs of barium stars, and like them, owe their chemical peculiarities to mass transfer across their binary system. Accordingly, an extensive data set probing the circumstellar environment of S stars (IRAS flux densities, maser emission, CO rotational lines) has been collected and critically evaluated. This data set ...

From the January 2017 Desktop News , Dr. Matthias Kaminski, an assistant professor in the Department of Physics and Astronomy recently teamed up with Nobel laureate Gerardt Hooft and a group of other international theoretical physicists at the biennial Schwarzschild conference in Frankfurt, Germany, to discuss the mysteries of black holes.. Although astrophysicists have found convincing evidence of the existence of black holes, some other bizarre properties remain behind our experimental grasp, said professor Bill Keel, a UA professor in the Department of Physics and Astronomy.. To better understand unexplained paradoxes and the reasons some experiments regarding black holes fail, theoretical physicists, like Kaminski-or more familiarly Albert Einstein and Stephen Hawking-try to think about new ways of seeing the universe and interpreting old theories.. At the conference, one of the main topics discussed was the paradox between a traditional understanding of gravity, which suggests that a ...

A team of astronomers has used the High Dispersion Spectrograph on the Subaru Telescope to conduct spectroscopic observations of Sun-like superflare stars first observed and cataloged by the Kepler Space Telescope. The investigations focused on the detailed properties of these stars and confirmed that Sun-like stars with large starspots can experience superflares. The team, made up of astronomers from Kyoto University, University of Hyogo, the National Astronomical Observatory of Japan (NAOJ), and Nagoya University, targeted a set of solar-type stars emitting very large flares that release total energies 10-10000 times greater than the biggest solar flares. Solar flares are energetic explosions in the solar atmosphere and are thought to occur by intense releases of magnetic energy around the sunspots. Large flares often cause massive bursts of high-speed plasma called coronal mass ejections (CMEs), can lead to geomagnetic storms on Earth. Such storms can have severe impacts on our daily life by

Topic: Earth and space science, Astronomy, Size and scale, Earth and space science, Astronomy, Stars, nebulae and galaxies, Earth and space science, Earth processes, Climate, Earth and space science, Solar system, Asteroids and comets, Earth and space science, Solar system, Origin/formation of solar system, Earth and space science, Solar system, Planetary geology, Earth and space science, Solar system, Planetary science, Earth and space science, Solar system, Planets, Earth and space science, Solar system, The moon, Earth and space science, Solar system, The sun, Space weather, Engineering and technology, Remote sensing, Life sciences, Astrobiology, Mathematics, Physical sciences, States of matter, Physical sciences, Structure and properties of matter, The nature of science, The scientific process, The nature of technology, The design process ...

NASA has released the first image from the Juno spacecraft since its arrival at Jupiter last week. This colour view of the gas giant and its moons was taken by the JunoCam imaging camera after the spacecraft entered orbit on 5 July (UTC). It confirms that JunoCam survived its first pass through Jupiters extreme radiation environment, and is ready to collect further images.. The image was taken on 10 July 2016 at 0530 UTC, when the spacecraft was 4.3 million kilometres (2.7 million miles) from Jupiter on the outbound leg of its initial 53.5-day capture orbit. The image shows atmospheric features on Jupiter, including the Great Red Spot, and three of Jupiters four largest moons which have been labeled here.. JunoCam will continue to image Jupiter during Junos capture orbits. The first high-resolution images of the planet will be taken on 27 August when the Juno spacecraft makes its next close pass to Jupiter.. ...

Recent discoveries by the Kepler space telescope and others indicate exoplanets are commonplace across the Milky Way and, by extension, the universe. With uncounted billions of planets presumed to exist, physicist Enrico Fermis famous question regarding the existence of aliens is more glaring than ever: Where are they?. That is, I think, one of the amazing discoveries of the last century or so - that planets are common, said Philip Lubin, an experimental cosmologist and professor of physics at the University of California at Santa Barbara.. If planets are commonplace, and if many of those worlds orbit in their stars habitable zones where water - and life - can, in theory exist, statistics alone would indicate life on other worlds is at least possible if not likely.. Given the lack of any such evidence to date, Lubin is heading up a mostly student-run survey to look for signs of continuous-wave laser transmissions - directed energy signatures - originating in the Andromeda galaxy. The ...

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An intermediate-mass black hole (IMBH) is a hypothetical class of black hole with mass in the range 100 to one million[citation needed] solar masses: significantly more than stellar black holes but less than supermassive black holes. There is as yet no unambiguous detection of an IMBH, but the indirect evidence from various directions is promising. The strongest evidence for IMBHs comes from a few low-luminosity active galactic nuclei. Due to their activity, these galaxies almost certainly contain accreting black holes, and in some case the black hole masses can be estimated using the technique of reverberation mapping. For instance, the spiral galaxy NGC 4395 at a distance of about 4 Mpc appears to contain a black hole with mass of about 3.6×105 solar masses.[relevant? - discuss] Some ultra-luminous X ray sources (ULXs) in nearby galaxies are suspected to be IMBHs, with masses of a hundred to a thousand solar masses. The ULXs are observed in star-forming regions (e.g., in starburst galaxy ...

Effective collecting area, angular resolution, field of view and energy response are fundamental attributes of X-ray telescopes. The performance of state-of-the-art telescopes is currently restricted by Wolter optics, especially for hard X-rays. Here we report the development of a stacked prism lens (SPL), which is lightweight and modular and has the potential for a significant improvement in effective area, while retaining high angular resolution. The proposed optics are built by stacking disks embedded with prismatic rings, created with photoresist by focused ultraviolet lithography. We demonstrate the SPL approach using a prototype lens that was manufactured and characterized at a synchrotron radiation facility. The design of a potential satellite-borne X-ray telescope is outlined and the performance is compared with contemporary missions. A stacked series of lithographed polymer disks could provide a lightweight and modular optics system for a future hard X-ray telescope, retaining the angular

Planetary magnetic fields are ubiquitous in the Solar System and extrasolar planets are common in the galaxy. However, no extrasolar planetary magnetic field (or exodynamo) has yet been directly detected. Magnetic fields offer a unique window into the internal structure and dynamics of planets, can be remotely detected by electron cyclotron emission at radio wavelengths, and are commonly assumed to be important for surface habitability. In this talk we describe the conditions necessary for the generation of magnetic fields in the cores of terrestrial exoplanets, how they might evolve over time, and the important role of internal heat sources. We demonstrate that eccentric Earth-mass planets in the habitable zone around M dwarfs are likely to be within the tidal zone, where gravitational tidal dissipation can be extreme, prolonging the magma ocean phase and inhibiting dynamo action. ...

All about the planets in our Solar System. The planets that orbit the sun are (in order from the sun): Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto (a dwarf planet or plutoid).

This image from Orion Telescopes & Binoculars Image Gallery of Moon 01-21-2013 was taken by Danny S. with an Orion SpaceProbe 130ST Equatorial Reflector Telescope, an Orion SteadyPix Deluxe Camera Mount, a 25mm Orion Sirius Plossl Telescope Eyepiece, an Orion Shorty 1.25

A moon was discovered orbiting the asteroid, Eugenia. This is only the second time in history that a satellite has been seen circling an asteroid. A special mirror allowed scientists to find the moon from a telescope on Earth. The mirror corrects for the blurring caused by Earths atmosphere. This effect is called adaptive optics. The Hubble Telescope was originally launched so scientists could see objects without looking through the atmosphere. Now, they can study objects from Earth as well. Making this discovery with the newly developed adaptive optics moves ground-based astronomy to the forefront in exploring neighboring objects in our solar system, said Vernon Pankonin, manager of NSFs planetary astronomy program. Asteroid satellites are very difficult to find. The first one, called Dactyl, was discovered by the Galileo spacecraft in 1993. It orbits the asteroid Ida. Eugenias moon was even harder to find, because the asteroid is much brighter than its moon. Its like looking for a ...

A moon was discovered orbiting the asteroid, Eugenia. This is only the second time in history that a satellite has been seen circling an asteroid. A special mirror allowed scientists to find the moon from a telescope on Earth. The mirror corrects for the blurring caused by Earths atmosphere. This effect is called adaptive optics. The Hubble Telescope was originally launched so scientists could see objects without looking through the atmosphere. Now, they can study objects from Earth as well. Making this discovery with the newly developed adaptive optics moves ground-based astronomy to the forefront in exploring neighboring objects in our solar system, said Vernon Pankonin, manager of NSFs planetary astronomy program. Asteroid satellites are very difficult to find. The first one, called Dactyl, was discovered by the Galileo spacecraft in 1993. It orbits the asteroid Ida. Eugenias moon was even harder to find, because the asteroid is much brighter than its moon. Its like looking for a ...

The basic optical design is decidedly simple for fabrication, integration and test purposes. This approach begins with the base optical design; all three powered mirrors are optically co-axial and simple conics. We considered more complicated designs, including the use of tilted and de-centered mirrors and Zernike and/or anamorphic surface figures.[2,3] TMA designs are widely preferred for high A*Omega telescopes such as JWST and ATLAST.. The primary mirror, referred to here as Telescope mirror 1 (T1), is a fast f/1.2 primary with a linear central obscuration of 31%. It is a light-weighted mirror using a hollow honeycomb core. T1 and Telescope mirror 2 (T2) together form an ~f/8, intermediate focus. This focus is uncorrected, with a large caustic image and strongly curved image surface. You will note the off-axis field bias (seen in Figure 1); this is typical in all TMA systems.. Within the instrument, Mirror 3 (M3) is almost a 1:1 magnification relay of the intermediate image to the focal ...

This image from Orion Telescopes and Binoculars Image Gallery of a Hydrogen Aplha Closeup was taken by Jimmy E. with a Meade Coronado Personal Solar Telescope on an Orion Atlas EQ-G Computerized GoTo Telescope Mount.

Astronomics has 160 years of experience using and selling telescopes. Our honesty & expertise helps us find you the right telescope.

Astronomics has 160 years of experience using and selling telescopes. Our honesty & expertise helps us find you the right telescope.

A bouquet of musky sweetness, bitter almonds, gasoline, and decomposing fish would likely fill the air on Saturns largest satellite.. Titan is Saturns biggest moon. It is so big, in fact, that it rivals Jupiters moon Ganymede for the title of the solar systems largest satellite. If you were to strip Titan bare by removing its atmosphere, Ganymede is slightly larger. But thats OK; Titan is still so fascinating that we can let Ganymede have that win.. Yes, Titan has an atmosphere. And not a small, inconsequential one, either: Titans atmosphere is four times denser than Earths. And while you wouldnt need a spacesuit to protect you against its pressure, you would need one heck of a parka. The surface temperature on Titan is a frigid -290 degrees Fahrenheit (-179 degrees Celsius). For reference, the coldest temperature ever recorded on Earth was when the mercury dropped to only about -129 F (-89 C) at Vostok Station in Antarctica in 1983.. So, an astronaut walking on the surface of Titan ...

2009 is the year dedicated to astronomy. Five planets were already found in 55 Cancri the system that looks like our solar system. According to Nasa: This artists concept illustrates two planetary systems - 55 Cancri and our own. Blue lines show the orbits of planets, including the dwarf planet Pluto in our solar system. The 55 Cancri system is currently the closest known analogue to our solar system, yet there are some fundamental differences. The similarities begin with the stars themselves, which are about the same mass and age. Both stars also host big families of planets. Our solar system has eight planets, while 55 Cancri has five, making it the record-holder for having the most known exoplanets. In fact, 55 Cancri could have additional planets, possibly even rocky ones that are too small to be seen with current technologies. All of the planets in the two systems have nearly circular orbits. In addition, both planetary systems have giant planets in their outer regions. The giant ...

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A unique science project designed to sow the excitement of scientific discovery in students is sprouting this week aboard the International Space Station. The Plants in Space project will allow students and teachers to examine root growth in microgravity and compare the results with those from plants used in their own ground-based experiments.. The National Space Biomedical Research Institute (NSBRI) is funding the project. It began Tuesday, Sept. 20, when space station astronauts planted Brassica rapa seeds during the first of four scheduled five-day trials. The projects primary scientific goal is to investigate the influence of light on root orientation. (learn more). ...

We review recent insights into the dynamics of the solar convection zone obtained from global numerical simulations, focusing on two recent developments in particular. The first is quasi-cyclic magnetic activity in a long-duration dynamo simulation. Although mean fields comprise only a few percent of the total magnetic energy they exhibit remarkable order, with multiple polarity reversals and systematic variability on time scales of 6-15 years. The second development concerns the maintenance of the meridional circulation. Recent high-resolution simulations have captured the subtle nonlinear dynamical balances with more fidelity than previous, more laminar models, yielding more coherent circulation patterns. These patterns are dominated by a single cell in each hemisphere, with poleward and equatorward flow in the upper and lower convection zone respectively. We briefly address the implications of and future of these modeling efforts ...

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TY - JOUR. T1 - Constraints on long-period planets from an L′- and M-band survey of nearby sun-like stars. T2 - Modeling results. AU - Heinze, A. N.. AU - Hinz, Philip M.. AU - Kenworthy, Matthew. AU - Meyer, Michael. AU - Sivanandam, Suresh. AU - Miller, Douglas. PY - 2010. Y1 - 2010. N2 - We have carried out an L′- and M-band adaptive optics (AO) extrasolar planet imaging survey of 54 nearby, Sun-like stars using the Clio camera at the MMT. Our survey concentrates more strongly than all others to date on very nearby F, G, and K stars, in that we have prioritized proximity higher than youth. Our survey is also the first to include extensive observations in the M band, which supplemented the primary L′ observations. These longer-wavelength bands are most useful for very nearby systems in which low-temperature planets with red IR colors (i.e., H - L′, H - M) could be detected. The survey detected no planets, but set interesting limits on planets and brown dwarfs in the star systems we ...

Black holes are an important area of research for theoretical physics as the behavior of the strong gravitational fields near the singularity of a black hole likely involve both gravitational and quantum effects. Understanding the behavior and properties of black holes tackles the ultimate goal of theoretical physics, unifying all known physical forces into a single theory. Recently, there has been much work done in understanding the thermodynamics of black holes, relating the properties of black holes to the laws of thermodynamics as well as understanding the concepts of information and entropy in the case of black holes. Considering black hole thermodynamics puts quantum effects and classical gravity in discussion with each other, as quantum field theory based descriptions of the Standard Model interactions on a curved spacetime around a black hole dictate black hole thermodynamics. In the course of this paper, I will derive and outline the various laws of black hole thermodynamics and discuss Hawking

Its time to leave the Universe behind. The History Channels the Universe series is out of new episodes, and their sponsorship is about to drop off this blog and Astronomy Cast. If the Universe was your favorite space series of all time, have no fear, it will be showing in reruns, and you can purchase the complete series on DVD.. Looking over the past summers series, we can see 13 episodes laid on in a steady march through the solar system, with occasional field trips to the outer cosmos. The episodes were: Secrets of the Sun; Mars: The Red Planet; The End of the Earth: Deep Space Threats To Our Planet; Jupiter: The Giant Planet; The Moon; Spaceship Earth; The Inner Planets: Mercury & Venus; Saturn: Lord of the Rings; Alien Galaxies; Life and Death of a Star; The Outer Planets; The Most Dangerous Place in the; and Search for ET.. Looking over these titles, shows can be grouped into 3 categories: Our Solar System (9 episodes), all other objects (2 episodes), and the search for ET (1 ...

Picture above, you can see the disk shape galaxy NGC 1277 that was captured by the Hubble Space Telescope. At the center of this galaxy is the black hole that scientists are saying accounts for 14% of the galaxys weight. To put the size of this black hole in perspective, our own milky way galaxy has a black hole equivalent to the mass of 4 million suns. NGC 1277 has the mass of 17 billion suns!. It has typically been thought that the mass of a galaxies black hole correlates to the mass of the stars in a galaxy. After this discovery however, it seems that theory may not be true. The ratio of this black hole to the mass of the stars in its galaxy are way off the typical charts. Small disk shaped galaxies typically have much smaller black holes that usually account for less than 1% of their mass. Finding one that accounts for 14% of its mass is truly rare. Black holes of this size are usually found elliptical galaxies.. It appears after further examination that this phenomenon isnt as rare as ...

The black hole located in HR 6819 points to an exciting (or terrifying) possibility. Nearly all of the black holes discovered within our galaxy to date have been violent ones that absorb the stars and planets around them, creating powerful x-rays as a result. This black hole is different as it exists quietly in its own system, undetected for years. This could mean there are thousands of black holes relatively close to our solar system, but we just havent seen them yet! The astronomers involved also believe a second system, LB-1, could contain a similar black hole - however more research is needed to determine this. On of our own Astronomers, Dr. Andreas Sander, has broken down what this discovery could mean for identifying future Black Holes. The discovery in the HR6819 system is a good example of how we extend our knowledge about stars and their lives and deaths. We know that Black Holes exist and that massive stars eventually end up collapsing into a Black Hole. But how massive do they need ...

Galaxy vs Solar System. The solar system and a galaxy are two different terms but sometimes are confused with one another. To understand the solar system, one should know the definition of a star system. A star system is a system in which planets orbit around a massive star. This is due to the gravitational attraction that is present in between them. A solar system is a specific kind of star system in which the Sun is at the centre. The solar system consists of anything that orbits the sun or orbits the planets which orbit the sun. The moon of earth, for example, is a part of our solar system. A galaxy, on the other hand, is a huge collection of stars that are held together by gravitational attraction. There can be a 100 million to over a trillion stars within a galaxy. It consists of interstellar gas, star clusters and numerous star systems. Many star systems can be part of a single galaxy but not the other way around.. Perhaps the biggest difference between a solar system and a galaxy is their ...

The region of our Milky Way galaxy that has been explored by the VVV survey, including coverage of the galactic center.. Finally, let´s go crazy and discuss life in free floating planets. This is pure speculation but I will contend that these objects are some of the most promising life vessels. As they travel across the Milky Way they can spread the seeds of life throughout the Galaxy. The main difficulty for a free floating planet to sustain life as we know it would be the absence of the main energy source: its parent star. However, when Earth-like planets form they are very hot, and then the igneous rock cools on the surface. The cooling process takes billions of years, depending on the original mass of the planet. For example, our Earth is 4.5 billion years old and it has not cooled down completely yet. Evidence of this are the volcanos throughout our planet´s crust, the plate tectonics, and the fact that seismology indicates that our planet nucleus is still igneous.. This volcanic activity ...

Researchers at UC Berkeley and LBNL share $500,000 Gruber Cosmology Prize for discovering universe acceleration. By Sarah Yang, Media Relations , 17 July 2007. BERKELEY - Researchers at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory (LBNL) have been awarded the 2007 Gruber Cosmology Prize for their role in the seminal discovery that the expansion of the universe is accelerating. This years prize recognizes Saul Perlmutter, a UC Berkeley physics professor and an LBNL astrophysicist; Brian Schmidt, an astronomer at Australian National University; and the respective international teams they led - the Supernova Cosmology Project and the High-z Supernova Search Team.. The $500,000 award will be shared by Perlmutter, Schmidt and the other members of the two supernova teams, which included 51 researchers from around the world. Both teams included faculty, post-doctoral researchers and graduate students from UC Berkeley.. The Gruber Cosmology Prize is a great ...

Of Contraction of the Universe which Finally Becomes Dominant in the Big Crunch!. In the interest of accuracy and also to mention that this information is being misused by NASA and other U.S. government propagandists to try to distract from and obscure the significance of black holes and the central role black holes play in the process of contraction of the Universe, which ultimately becomes dominant over the simultaneous process of expansion. First, it is a fact that matter generally enters a black hole through a combination of both gravitation and magnetism. Matter in the accretion disk which spins around the black hole can only enter the black hole after it loses its angular momentum. The inertia of the material in the accretion disk keeps it spiraling in a disk rather than falling straight into the black hole. The inertia in turn is due to the mass of the material in the disc and the gravitational field caused by the extremely rapid rotation of the black hole itself. An accretion disc is a ...

Of Contraction of the Universe which Finally Becomes Dominant in the Big Crunch!. In the interest of accuracy and also to mention that this information is being misused by NASA and other U.S. government propagandists to try to distract from and obscure the significance of black holes and the central role black holes play in the process of contraction of the Universe, which ultimately becomes dominant over the simultaneous process of expansion. First, it is a fact that matter generally enters a black hole through a combination of both gravitation and magnetism. Matter in the accretion disk which spins around the black hole can only enter the black hole after it loses its angular momentum. The inertia of the material in the accretion disk keeps it spiraling in a disk rather than falling straight into the black hole. The inertia in turn is due to the mass of the material in the disc and the gravitational field caused by the extremely rapid rotation of the black hole itself. An accretion disc is a ...

Observations and analysis of stellar spectra are the main instrument used for study of the stellar atmospheres. Spectral line formation in the atmosphere of a star is a very complex process and it requires a detailed treatment with non-local thermodynamic equilibrium taken into account for correct interpretation of the observations. In INASAN the comprehensive research in the field of both stellar spectra theory and observations is carried on. The results are successfully applied to study the mechanisms of the anomalies in the chemical composition of atmospheres.. INASAN scientists are involved in various studies related to early stages of protostellar and stellar evolution. Specific research directions include chemical evolution of protostellar clouds and protoplanetary disks, evolution of HII regions, dust formation and destruction in star-forming regions, chemical effect of grain growth in protoplanetary disks, line and continuum radiation transfer in related objects, etc.. More information ...

A University of Pennsylvania-led project, the Spectroscopic Terahertz Airborne Receiver for Far-InfraRed Exploration, or STARFIRE, has received a $700,000 grant from NASA to investigate a longstanding mystery in cosmology.. Through centuries of careful observation, scientists have developed a clear picture of what the universe looked like in its infancy. This picture stretches from the Big Bang to the so-called dark ages of the universe, to the collapsing clouds of gas and dust that formed the very first stars in the very first galaxies.. But there are gaps in our understanding of how the universe evolved into the one we live in today.. Scientists at Penn and NASAs Jet Propulsion Laboratory are hoping to change that through STARFIRE. The project is led by James Aguirre, an associate professor of physics and astronomy in Penns School of Arts & Sciences.. ​​​​​​​STARFIRE will help us investigate what was going on within galaxies when the universe was around half its current ...

The exploration of extrasolar planets is an exploding research area in astronomy. Sixteen years after the first detection of an exoplanet around a solar-type star, more than 1000 objects have been detected. While the first detections were achieved by the radial velocimetry technique, more and more exoplanets (presently over 400) have been identified through the transit method, using both ground-based surveys and dedicated space missions. Following the pioneering work of CoRoT, the Kepler mission has reached a major achievement in the detection of transiting planets, identifying thousands of possible candidates and opening the possibility of detecting super-Earths in the habitable zone of their host stars [1].. These new discoveries have made possible the development of a new research field, the spectroscopic characterization of the exoplanets atmospheres. In the first step, primary transits were considered, when the planet crosses the star in front of it. The absorbed light of the planetary ...

I want to draw attention to a supernova impostor that has flared back up, and some are saying it could have gone supernova. Here is a link to the relevant Astronomers Telegram:. http://www.astronomerstelegram.org/?read=4412. Supernova imposters are visually as bright as supernova but they do not destroy the progenitor and some of them, like SN 2009ip have a repeat eruption. As the ATEL reports, Nathan Smith has guessed that this one might have popped off as a true supernova this time. Eta Carinaes great eruption in the 1840s is the prototype for this kind of object in our own galaxy.. Observing this object is a stretch for most northern hemisphere observers because it is at Declination -29. However it is an object of great interest and any good CCD photometry would be appreciated. Johnson V is normally most helpful. Cousins R and I are also useful for supernova impostors (because dust production can make them redder as they evolve).. Here is a link to photo on flicker with the object ...

Water is the medium in which the chemistry of all life on Earth takes place. The NAI UH Team will focus on scenarios involving the sources and distribution of water in planetary systems and the delivery and incorporation of water into rocky habitable planets. The team will investigate:. The Origin of Earths Water - Constraining the origin of Earths water by better characterizing the D/H ratio of the primitive mantle. D/H in the Interstellar Medium, Disks and the Solar System - Determining the relationship of the highly deuterium-enriched circumstellar envelope material with the planet-forming disks in these systems, and investigating the evolution of D/H in a mature planetary system through observations of comets and models of ice fractionation processes. Ice Chemistry in the Solar System - Investigating the processing of primitive Solar system material and ices by energetic particles that leads to lifes precursor molecules. The Main Belt Comets - Surveying the sky for Main Belt Comets, a new ...

Astroboffins are excited about a newly-discovered dwarf planet, despite not knowing what it looks like.. The discovery of 2015 RR245 comes from the Outer Solar System Origins Survey (OSSOS), which back in March spotted alignments in Kuiper Belt Objects that fuelled the controversial planet X theory.. The new object has so large an orbit that astronomers dont yet have enough data to do much more than say residents would only get to sing Happy Birthday about once every 700 Earth-years.. At least 2015 RR245 (its Astronomical Unions Minor Planet Center designation), was spotted not by an algorithm, but by a human. As Canadas University of Victoria explains, researcher and adjunct professor JJ Kavelaars spotted the object as a point of light moving on-screen.. Astronomy postdoc Michele Bannister put it like this: There it was on the screen, this dot of light, moving so slow that it had to be at least twice as far as Neptune from the sun.. So far, the researchers have worked out that the ...

Huge. Massive. Gigantic. Monstrous. Ginormous. Words fail to describe two huge black holes that may be the largest ever measured. Supermassive black holes inhabit most large galaxies, but these are super-huge light-sucking monstrosities.. The first is in galaxy NGC 3842 and it has the mass of about 10 billion suns, while NGC 4889′s monster could weigh up to 37 billion suns, according to Nicholas McConnell at the University of California, Berkeley. They are able to get the estimates by observing the motion of stars near these galaxies cores, because a black holes mass determines how fast objects orbit around them.. However its not as straight forward as that. For instance, in 2008, a mass of 18 billion suns was claimed for the black hole inside a distant bright galaxy called OJ287. But this is an assumption based on the thought that periodic flares from OJ287 are created by a second black hole orbiting the first. As McConnell says, Observations cannot rule out alternative ways of creating ...

A computer simulation of a black hole in real time showing how gas falling in forms a disc that spins around the black hole. The friction causes the gas to become so hot it produces beams of UV radiation.. Ahead of publication, Professor Bland-Hawthorn will unveil the research at the international Galaxy Zoo science conference on 24 September in Sydney.. Its been long suspected that our Galactic Center might have sporadically flared up in the past. These observations are a highly suggestive smoking gun, said Martin Rees, Astronomer Royal, who was one of the first scientists to suggest that massive black holes power quasars.. The evidence for the findings comes from a lacy filament of hydrogen gas called the Magellanic Stream. It trails behind our galaxys two small companion galaxies, the Large and Small Magellanic Clouds.. Since 1996, weve been aware of an odd glow from the Magellanic Stream, but didnt understand the cause. Then this year, it finally dawned on me that it must be the ...

New York, June 3 (IANS) A massive amount of ammonia gas lies beneath the colourful clouds on Jupiter, astronomers have revealed, a discovery coming just a month prior to the arrival of NASAs Juno spacecraft at the planet on July 4. Using the Karl G. Jansky Very Large Array in New Mexico, the researchers from University of California-Berkeley measured radio emissions from Jupiters atmosphere in wavelength bands where clouds are transparent. The observers were able to see as deep as 100 km below the cloud tops, a largely unexplored region where clouds form.. The planets thermal radio emissions are partially absorbed by ammonia gas. Based on the amount of absorption, the researchers could determine how much ammonia is present and at what depth.. We, in essence, created a three-dimensional picture of ammonia gas in Jupiters atmosphere, which reveals upward and downward motions within the turbulent atmosphere, said principal author Imke de Pater, a UC Berkeley professor of astronomy.. ...

Astronomers have uncovered a near-record-breaking supermassive black hole, weighing 17 billion suns, in an unlikely place: in the center of a galaxy in a sparsely populated area of the universe.. The observations, made by NASAs Hubble Space Telescope and the Gemini telescope in Hawaii, could indicate that these monster objects may be more common than once thought.. Until now, the biggest supermassive black holes those roughly 10 billion times the mass of our sun have been found at the cores of very large galaxies in regions of the universe packed with other large galaxies. In fact, the current record holder tips the scale at 21 billion suns and resides in the crowded Coma galaxy cluster, which consists of over 1,000 galaxies.. The newly discovered supersized black hole resides in the center of a massive elliptical galaxy, NGC 1600, located in a cosmic backwater, a small grouping of 20 or so galaxies, said lead discoverer Chung-Pei Ma, a University of California-Berkeley astronomer and head of ...

Most galaxies in the universe, including our own Milky Way, harbor super-massive black holes varying in mass from about one million to about 10 billion times the mass of our sun. To find them, astronomers look for the enormous amount of radiation emitted by gas which falls into such objects during the times that the black holes are active, i.e., accreting matter. This gas infall into massive black holes is believed to be the means by which black holes grow.

Just like normal black holes, they are regions of space-time with gravitational effects so strong that even electromagnetic radiation such as light can not escape from inside of them.. Julie Comerford, an astronomer at the University of Colorado Boulder, has led a team of scientists in analyzing this particular black hole and its two burps.. The Hubble telescope then picked up clouds of blue-green gas emerging from the black hole from a previous burp. While these two events are thought to have happened some 100,000 years apart, thats actually an incredibly short period of time when were talking about black hole activity. While even light can not escape the pull of one of these gravity wells, blacks holes do, very occasionally, burp back out chunks of half-consumed gas.. A paper on the subject was published in a recent issue of The Astrophysical Journal.. The black hole in question, known as J1354, is situated about 800 million light years from Earth and was studied using data captured by ...

Scientists have, for the first time, captured an image of a black hole. The image, captured by the Event Horizon Telescope, shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun, according to EHT officials. The image is the first visual evidence of a supermassive black hole. The shadow of a black hole is the closest scientists are able to get to taking a photo of the black hole itself, since black holes are

Scientists have, for the first time, captured an image of a black hole. The image, captured by the Event Horizon Telescope, shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun, according to EHT officials. The image is the first visual evidence of a supermassive black hole. The shadow of a black hole is the closest scientists are able to get to taking a photo of the black hole itself, since black holes are

Scientists have, for the first time, captured an image of a black hole. The image, captured by the Event Horizon Telescope, shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun, according to EHT officials. The image is the first visual evidence of a supermassive black hole. The shadow of a black hole is the closest scientists are able to get to taking a photo of the black hole itself, since black holes are

Scientists have, for the first time, captured an image of a black hole.The image, captured by the Event Horizon Telescope, shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun, according to EHT officials.The image is the first visual evidence of a supermassive black hole. The shadow of a black hole is the closest scientists are able to get to taking a photo of the black hole itself, since black holes are

Scientists have, for the first time, captured an image of a black hole.The image, captured by the Event Horizon Telescope, shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun, according to EHT officials.The image is the first visual evidence of a supermassive black hole. The shadow of a black hole is the closest scientists are able to get to taking a photo of the black hole itself, since black holes are

Scientists have, for the first time, captured an image of a black hole.The image, captured by the Event Horizon Telescope, shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun, according to EHT officials.The image is the first visual evidence of a supermassive black hole. The shadow of a black hole is the closest scientists are able to get to taking a photo of the black hole itself, since black holes are

Scientists have, for the first time, captured an image of a black hole.The image, captured by the Event Horizon Telescope, shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun, according to EHT officials.The image is the first visual evidence of a supermassive black hole. The shadow of a black hole is the closest scientists are able to get to taking a photo of the black hole itself, since black holes are

According to the core instability model, giant planet formation is based first on the formation of a solid core which, when massive enough, can gravitationally bind gas from the nebula to form the envelope. The most critical part of the model is the formation time of the core: it has to grow up to several Earth masses before the gas component of the protoplanetary disc dissipates in order to trigger the accretion of gas. The growth of giant planets cores occur mainly in the so-called oligarchic regime. Embryos growing in the disc stir their neighbour planetesimals, exciting their relative velocities, which makes accretion more difficult. In previous versions of our model, interactions between protoplanets and planetesimals were oversimplified, leading to a fast planetary formation. Here we introduce a more realistic treatment for the evolution of planetesimals relative velocities, which directly impact on the formation timescale. In the case o f simultaneous formation, we developed a simple ...

CHAMPAIGN, Ill. - Imagine reading by the light of an exploded star, brighter than a full moon - it might be fun to think about, but this scene is the prelude to a disaster when the radiation devastates life as we know it. Killer cosmic rays from nearby supernovae could be the culprit behind at least one mass extinction event, researchers said, and finding certain radioactive isotopes in Earths rock record could confirm this scenario.. A new study led by University of Illinois, Urbana-Champaign astronomy and physics professor Brian Fields explores the possibility that astronomical events were responsible for an extinction event 359 million years ago, at the boundary between the Devonian and Carboniferous periods.. The paper is published in the Proceedings of the National Academy of Sciences.. The team concentrated on the Devonian-Carboniferous boundary because those rocks contain hundreds of thousands of generations of plant spores that appear to be sunburnt by ultraviolet light - evidence of a ...

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The series of IAU Bioastronomy meetings have played an important role in integrating the broader interests and techniques of both astronomy and biology to understand the origin and evolution of life in our solar system, and of living systems in the universe. The theme of the 2007 meeting, Molecules, Microbes, and Extraterrestrial Life, deals with topics relevant both to solar system origins as well as to the NASA Vision of the Moon, Mars, and Beyond. The meeting location was selected because it is the site of one of the worlds premier radio observatories at Arecibo, and because Puerto Rico is an astrobiologically relevant environment rich in biodiversity and well-suited for extremophile (halophile) studies. The meeting was held at a critical time for important science milestones, with recent commissioning of the CARMA millimeter array and the Allen Telescope Array in California , and coincident with (or just prior to) several planetary mission launches relevant to the NASA Vision and ...

BDT: 10,500. Samsung Mobiles: Release: Price in BD: Samsung Galaxy A21s: 2020, May: ৳ 19,000.00 BDT: Samsung Galaxy Note 20 Plus 5G: 2020, August: N/A: Samsung Galaxy S20 This amazing device has Dolby ATMOS 360 degree surround sound. Mar 8. Currently, The Samsung Galaxy A20 price in Bangladesh is BDT 15990 (Approx). We ambition to portion the latest opinion concerning mobile phone price, specifications, news, reviews and showroom locations in Bangladesh. Samsung Galaxy A20 smartphone was launched on 2019. Its the size of the phone in format (H x L x W) and the volume of the phone where available. Display Resolution is the measuring way of how much pixels does a display contains. Samsung Galaxy A20 Price in Bangladesh The back camera is of dual 13+5 MP with PDAF, LED flash, ultrawide, depth sensor etc. The dual-SIM device Samsung Galaxy A20 runs on Android 9.0 Pie, and sports an Infinity U Display. It is a light weight smartphone with stylish outlook. Samsung Galaxy A20 Price in Bangladesh. ...