Across
- 3. A spacecraft designed to carry people into space.
- 7. The first artificial satellite launched into orbit.
- 8. A large natural object orbiting the Sun.
- 10. A natural satellite of a planet.
- 11. A person who travels into space.
- 14. A cloud of dust and gas in space.
- 15. A telescope that uses radio waves to observe the universe.
Down
- 1. A spacecraft designed to orbit a planet.
- 2. The first human to walk on the Moon
- 4. A device used to measure the intensity of light.
- 5. A spacecraft designed to land on another celestial body.
- 6. The study of the universe and its contents.
- 9. A region of space where there is no gravity.
- 12. A unit of distance used in astronomy.
- 13. A unit of time used in astronomy.
- 16. A space station launched by the Soviet Union in 1971.