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Celestial Bodies
star |
planet |
dwarf planet |
moon (or satellite) |
asteroid |
comet |
small solar system body |
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Definitions
Large, glowing ball of gas. Generates heat and light through nuclear fusion in its core. |
Large object that (1) orbits a star, (2) is large enough for its own gravity to make it round, (3) has cleared most other objects from its orbital path. Shines by reflecting light from its star. |
Object that fails to meet the last criterion to be a planet. |
Orbits a planet. Can refer to any object orbiting another object. |
Small, rocky object that orbits a star. |
Small, ice-rich object that orbits a star. |
Asteroid, comet, or other object that orbits a star but is too small to qualify as a planet or dwarf planet |
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Examples
Sun |
Earth |
Pluto |
Europa (of Jupiter) |
Apophis |
Halley's Comet |
Asteroids, Comets, etc. |
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