Across
- 2. The path around a planet or star.
- 4. Groups of clusters of galaxies.
- 5. A star and all of the objects that travel around it.
- 7. The study of space and things we find in space.
- 9. A scientist who specializes in the study of space.
Down
- 1. A tool for seeing farther than is possible with the naked eye.
- 2. Buildings used for observing the sky with a telescope.
- 3. The layer of gases that surround a planet.
- 6. A large group of stars, dust, and gas gathered together in space.
- 8. Earth, the planets, the stars, and all the things that exist in space.
- 10. The galaxy that includes Earth and our solar system.