Across
- 4. A space rock that becomes bright when it enters Earth's atmosphere.
- 5. An instrument used to observe objects that are very far away in space.
- 7. A huge group of stars, gas, and dust held together by gravity.
Down
- 1. Everything that exists, including stars, planets, galaxies, and space.
- 2. The study of stars, planets, and other objects in space.
- 3. A large object that travels around a star, such as Earth.
- 6. A huge object in space that produces its own light.