Across
- 5. — Region between Mars and Jupiter with many asteroids
- 6. — Explosive death of a massive star
- 8. — Giant cloud of gas where stars form
- 10. — Rocky object orbiting the sun
- 12. — Closest planet to the sun
- 15. — Farthest planet from the sun
- 16. — Region where gravity is so strong light cannot escape
- 17. — Stream of charged particles from the sun
- 19. — Extremely bright object powered by a black hole
- 21. — Icy object with a glowing tail when near the sun
- 24. — Study of the origin and structure of the universe
- 27. — Distance light travels in one year
- 29. — Study of the physical properties of celestial objects
Down
- 1. — Rapidly spinning neutron star that emits radiation
- 2. — Ice giant that rotates on its side
- 3. — Event when one celestial body blocks another
- 4. — Meteor that reaches Earth's surface
- 7. — Path one object takes around another
- 9. — Force that pulls objects together
- 11. — Largest planet in the solar system
- 13. — Planet known for its thick, hot atmosphere
- 14. — Planet famous for its rings
- 18. — Distant spherical cloud of comets around the solar system
- 20. — Area of icy objects beyond Neptune
- 22. — Instrument used to observe distant objects in space
- 23. — The only known planet with life
- 25. — Streak of light from a space rock burning in the atmosphere
- 26. — Massive system of stars, gas, and dust
- 28. — The “red planet”