Across
- 4. a place with conditions where a living thing can survive
- 5. the area around a star that is not too hot or too cold for liquid water to exist
- 7. the air that surrounds a planet
- 9. system all the objects that orbit around a star
- 10. dioxide a type of gas that plants sometimes take in and that animals release when they breathe
- 11. a large, round object in outer space that orbits a star
Down
- 1. a scientist who studies outer space
- 2. a tool used to make very distant objects look closer, often used to look at space
- 3. describes when there is a lot of visible light; the opposite of dim
- 6. describes when there is not a lot of visible light; the opposite of bright
- 8. a planet that orbits a star outside of our solar system