Across
- 4. Space rocks that may have caused dinosaurs extinction
- 6. A galaxy about 2.5 million light-years away
- 8. The apparent path of the Sun on the Celestial Sphere
- 10. The complete cycle that water goes through on Earth
- 15. A type of galaxy lacking in normal structure
- 16. Stars that show a sudden large increase in brightness before slowly returning to it's original state
- 19. Regions on the Sun's surface where gas leaves at speeds of about 100 km/s
- 20. A planet closely resembling the surface of the Moon
Down
- 1. Saturn's largest moon
- 2. One of two types of planets, terrestrial and ______
- 3. Literally everything
- 5. A type of telescope used in Astronomy
- 7. A band of colors produced by separation of the components of light by their different degrees of refraction according to wavelength
- 9. When people eat people OR a gruesome celestial happening
- 11. A cloud of gas and dust in outer space
- 12. Only one planet so far has this luxurious quality, and it's Earth
- 13. The envelope of gasses surrounding a planet
- 14. A theoretical model of the planets orbiting earth
- 17. A rapidly rotating star that shows up in radio waves
- 18. A huge collection of matter isolated in space and bound together by gravity