Universe Vocabulary

3. a small body of ice, rock, and cosmic dust that follows an elliptical orbit around the sun
4. the sun and all of the planets and other bodies that travel around it
6. the gas and dust located between the stars in a galaxy
8. a large, reddish star late in its life cycle
11. a natural or artificial body that revolves around a celestial body that is greater in mass
12. a large cloud of gas and dust in interstellar space
15. a group of stars or galaxies bound by gravity
16. a collection of stars, dust, and gas bound together by gravity
18. an event in which the shadow of one celestial body falls onto another
19. a celestial body that orbits the sun
21. a model for the formation of the solar system in which the sun and planets condense from a cloud of gas and dust
22. a planet that has a deep, massive atmosphere, such as Jupiter
23. a small, hot, dim star that is the leftover center of an old star

1. the portion of Earth that is water
2. one of the highly dense planets nearest to the sun
5. a large celestial body that is composed of gas and that emits light
7. distance that light travels in one year
9. a gigantic explosion in which a massive star collapses and throws its outer layers into space
10. the change in the illuminated area of one celestial body as seen from another celestial body
13. an object so massive and dense that even light cannot escape its gravity
14. a planet-like body that orbits a star other than the sun
17. a small, rocky object that orbits the sun
20. a celestial body that orbits the sun, is round because of its own gravity, but has not cleared its orbital path