Across
- 2. Ball of gas undergoing fusion reactions.
- 5. Large sphere that orbits the Sun or a star.
- 7. All of space and everything within it.
- 10. Very large rocks in space that orbit the Sun.
- 11. Collection of stars, solar systems, and gas.
- 12. Anything that has mass and takes up space.
- 13. Reactions that produce atoms, light, & heat.
- 14. Meteoroids that made it to Earth's surface.
- 15. The name given to our own galaxy.
- 16. Broken off piece of an asteroid.
Down
- 1. Large ball of mostly ice that orbits the Sun.
- 2. Giant explosion when a large star collapses.
- 3. The building blocks of matter.
- 4. The Sun and all objects that orbit the Sun.
- 6. Dense area of space with very strong gravity.
- 8. Large cloud of gas and dust in space.
- 9. Force that pulls objects toward each other.
- 12. Meteoroids burning up in our atmosphere.