Across
- 2. An instrument used to see distant objects in space
- 5. A person who is trained to travel and work in space
- 7. An artificial object placed in orbit around the earth to collect information
Down
- 1. A streak of light caused by a space rock burning up in the atmosphere
- 3. A large round celestial body that orbits a star
- 4. The curved path that an object takes around a star or planet
- 5. A small rocky body that orbits the sun
- 6. A massive system of millions or billions of stars held together by gravity