Across
- 2. Galaxy our solar system is found in
- 6. Phase in which the side of the Moon facing Earth is dark
- 8. First person to step foot on the Moon
- 10. Most distintive feature on the Moon's surface
- 11. Phase in which we see the right half of the Moon
- 14. Missions that took humans to the Moon
- 16. Space station currently in orbit around the Earth
- 18. Eclipse when the Earth is between the Moon and Sun
- 19. Eclipse when the Moon is between the Earth and Sun
- 21. First instrument used to observe space
- 22. Theory that could help explain the formation of the universe
- 25. Phase in which the side of the Moon facing Earth is illuminated
- 26. Group of planets closest to the Sun with rocky surfaces and thin atmospheres
- 27. Lowest high tides and highest low tides
- 28. Shape of planetary orbits
Down
- 1. Was part of the original nine planets, and was reclassified as a dwarf in 2006
- 3. When we have the least daylight hours; December 21-22
- 4. Reason we have seasons
- 5. When we have to most daylight hours; June 21-22
- 6. Cloud of dust and gas that birth stars
- 7. Phase in which we see the left half of the Moon
- 9. Cool stars
- 12. Objects in space that are moving away from us
- 13. The center of our solar system
- 15. Group of planets furthest from the Sun made mostly of gas
- 17. Reusable vessel to travel into space
- 20. Highest high tides and lowest low tides
- 23. First person to look through a telescope
- 24. Hot stars