Across
- 1. n. a very big group of stars
- 5. v. to speak or write to someone
- 9. n. a large world like Earth
- 10. adj. very strong
- 12. n. words you send to someone
- 14. n. how far it is from one place to another
- 16. adv. in another place
- 17. v. to find out what something is
- 18. n. a way of doing something
Down
- 2. n. a person who travels in space
- 3. n. a scientist who studies stars and planets
- 4. v. to get something
- 6. v. to go around something
- 7. n. a tool for seeing far into space
- 8. adj. smart; able to think and learn
- 11. n. space and everything in it
- 13. v. to look for something
- 15. prep. further than