science

12345678910
Across
  1. 4. the blue-white core that is left behind and cools
  2. 6. a stars actual brightness
  3. 8. a theory of how the universe was formed
  4. 9. a stars brightness as seen from earth
  5. 10. a group of single stars
Down
  1. 1. all of space and everything in it
  2. 2. the explosion of a supergiant star
  3. 3. a contracting cloud of gas and dust with enough mass to form a star
  4. 5. a large cloud of gas and dust containing an immense volume of material
  5. 7. the distance light travels in a year