Across
- 3. huge assemblage of stars, interstellar gas, and dust.
- 7. made from massive stars
- 8. called a "falling star.”
- 9. nearest star to earth
Down
- 1. planets are the four nearest the Sun.
- 2. groups of stars that have regularly recognized positions.
- 4. small rocky bodies that orbit the sun
- 5. theory that our universe began with a primordial explosion
- 6. are masses of water, methane, and ice
- 8. spins about its polar axis as it revolves around Earth.