Across
- 2. Saturn is most remarkablefor its easily seen rings.
- 4. is a huge assemblage of stars, interstellargas, and dust.
- 6. Uranus is twice as far fromEarth as Saturn is.
- 9. is a theory that our universe began with aprimordial explosion some 13.7 billion years ago.
- 10. is what remains when a supergiant star collapsesinto itself.
Down
- 1. are groups of stars that haveregularly recognized positions.
- 3. afterthe Big Bang, ordinarymatter as well as dark matterbegan to clump togetherdue to gravity.
- 5. upiter is the first of the outer planets, beyond
- 7. galaxies form stars at a very fast rate.They result from violent disturbances, such asthe collision between two galaxies.
- 8. Earth is the third planet from the Sun