Across
- 2. large round object that orbits a star
- 5. an object that orbits a planet
- 8. any object outside of earth's atmosphere
- 10. study of celestial bodies
- 11. dusty snowball (made of ice and rock)
Down
- 1. dense star that light can escape from
- 3. a collection of planets, asteroids, comets, etc. orbiting a star
- 4. a rocky object that crashes into earth
- 6. a collection of solar systems orbiting a huge star or black hole
- 7. asteroids that enter the earth's atmosphere (shooting stars)
- 9. a rocky object (smaller than a planet) orbiting the sun