Across
- 3. a vehicle used for travelling in space
- 7. a person who is trained to travel in a spacecraft
- 8. the planet closest to earth
- 9. a group of stars that form a pattern
Down
- 1. a gas planet that is the largest planet in the solar system
- 2. a cold desert-like planet
- 4. a scientist who studies the universe
- 5. objects made of frozen gases, rock and dust that orbit the sun
- 6. an American who was the first man on the moon
- 7. an envelope of gases surrounding the earth or another planet