The eighth planet in order from the sun. It is one of the five outer planets of the solar system. Its two natural satellites are Nereid and Triton.
Minor Planets
Small solar system planetary bodies including asteroids. Most asteroids are found within the gap lying between the orbits of Mars and Jupiter.
Uranus
The seventh planet in order from the sun. It is one of the five outer planets of the solar system. It has five known natural satellites.
Evolution, Planetary
Creation and development of bodies within solar systems, includes study of early planetary geology.
Euphausiacea
An order of pelagic, shrimplike CRUSTACEA. Many consume ZOOPLANKTON and a few are predacious. Many antarctic species, such as Euphausia superba, constitute the chief food of other animals.