Across
- 2. an object made by a human being
- 4. when the stars can be seen
- 5. information that proves or supports an idea
- 7. a representation of something, usually at a smaller scale
- 9. excessive light from cities that blocks the light from stars
- 10. someone who studies stars and planets
- 12. _______ is made up of the sun and all the smaller objects that move around it
Down
- 1. someone who studies human history by examining artifacts and sites
- 3. to carry out research so as to find new information
- 6. when the sun can be seen
- 8. Andromeda is one of these
- 11. the sun is the closest _____ to Earth