Across
- 4. The closest star to Earth
- 8. Phenomenon where light is bent by gravity
- 9. A small, icy body that orbits the Sun
- 10. The point in orbit when a planet is closest to the Sun
- 14. The point in orbit when a planet is farthest from the Sun
- 16. The study of celestial bodies beyond our solar system
- 17. The second planet from the Sun
- 19. Star at the center of our solar system
- 20. Largest planet in our solar system
Down
- 1. Largest moon of Saturn
- 2. Red planet in our solar system
- 3. Brightest object in the night sky
- 5. Cluster of stars in the night sky
- 6. The fourth planet from the Sun
- 7. Galaxy that contains our solar system
- 11. Space agency that landed humans on the Moon
- 12. The third planet from the Sun
- 13. Satellite of Earth
- 15. Famous comet with a periodic orbit
- 18. Satellite launched by the Soviet Union in 1957