Across
- 2. A cloud of gas and dust from a star exploding as it becomes a white dwarf
- 4. A disk of gas, dust, stars, and planets
- 6. A type of galaxy for galaxies that don't fit in any other categories
- 7. Our nearest neighboring galaxy
- 9. Round galaxies with no arms
- 11. A group of stars that formed close together at around the same time
- 13. How luminous something actually is
- 14. How bright something looks from Earth
- 16. M42: The sword under the belt
- 17. A planet-sized, dense star formed when a low-mass star loses its outer layers as a nebula
Down
- 1. A type of galaxy with arms extending out from the center
- 3. A type of galaxy with arms branching out from a straight center
- 5. M1: Bright supernova remnant in Taurus
- 8. Brightness
- 10. M45: Open star cluster in Taurus
- 11. A powerful explosion from a massive dying star that leaves behind remnants of gas and dust
- 12. A rapidly rotating neutron star
- 15. A very dense, small star, formed after a very massive star goes supernova