Across
- 4. A model in which the sun revolves around the Earth
- 6. The largest telescope deployed into space.
- 10. A nebulae shaped like the head of a horse.
- 12. Discovered four of Jupiter's moons.
- 13. The biggest planet in our solar system
- 14. A star whose brightness as seen from earth changes over time.
- 17. A collapsed core of a massive supergiant star.
- 19. A system of lights caused by the earth's magnetosphere.
- 20. The second closest planet to the sun.
Down
- 1. The biggest moon around Jupiter.
- 2. A type of radiation that fills the entire universe.
- 3. An Array of small radar dishes at the SETI Institute in California.
- 5. A dying star in its final stages of stellar evolution.
- 7. A spectrum of color used to decode tyhe composition of stars.
- 8. Where all of the galaxies are located.
- 9. An Asteroid Belt beyond Neptune
- 11. A type of galaxy where the solar system seem to be in a huge cluster.
- 15. The Closest galaxy to the milky way.
- 16. Black Blemishes on the surface of the Sun
- 18. A Galaxy undergoing an exceptionally high rate of star formation.