1. Relating to the sky or heavens

1. Relating to the universe

2. Distance light travels in a year

3. Instrument used to observe distant objects

4. A group of stars close together

5. Piece of rock from space that survives its journey through the Earth's atmosphere

6. The scientific study of celestial objects

7. Fourth planet from the sun

8. Extraterrestrial life form

9. Prominent constellation in the night sky

9. The path an object takes around another object

10. The blocking of light from one celestial body by another

11. Interstellar cloud of gas and dust

12. Icy body that releases gas and dust when near the sun

13. Luminous celestial objects

14. Fine particles in space

15. Relating to the sun

16. Sixth planet from the sun, known for its rings

17. Bright streak of light produced by a meteoroid

18. A highly magnetized rotating neutron star

19. Celestial body orbiting a star