Deep Sky Objects (DSO)

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