Across
- 4. small celestial bodies that orbit planets
- 5. satelights designed to study outer space
- 7. study of life beyond Earth
- 8. type of star solar system orbits around
Down
- 1. a red planet where scientists are searching for life
- 2. A person who studies life in the universe
- 3. frozen water found on Mars, Saturn and moons
- 6. a tool used by scientists to observe planets and stars