Could there be life on other planets?

1234567891011
Across
  1. 4. a place with conditions where a living thing can survive
  2. 5. the area around a star that is not too hot or too cold for liquid water to exist
  3. 7. the air that surrounds a planet
  4. 9. system all the objects that orbit around a star
  5. 10. dioxide a type of gas that plants sometimes take in and that animals release when they breathe
  6. 11. a large, round object in outer space that orbits a star
Down
  1. 1. a scientist who studies outer space
  2. 2. a tool used to make very distant objects look closer, often used to look at space
  3. 3. describes when there is a lot of visible light; the opposite of dim
  4. 6. describes when there is not a lot of visible light; the opposite of bright
  5. 8. a planet that orbits a star outside of our solar system