Across
- 2. Our solar system's star
- 5. the "once a planet" celestial object
- 7. Closest galaxy to us
- 9. Guy who discovered the moon Europa
- 11. The type of black hole that resides at the center of our galaxy
- 12. Incredibly bright, active galactic nuclei
Down
- 1. The moon of Jupiter that could contain life
- 3. Rapidly rotating neutron stars
- 4. The name of the belt of the galaxy that our solar system is in
- 6. The "tunnels" between different space times that could theoretically exist according to Einstein
- 8. The galaxy that will one day collide with us
- 10. One of these - tsp, tbsp, ml - of a neutron star weighs as much as the human population