Universe by Kena

123456789101112131415
Across
  1. 1. leftover "heat" from the big bang.
  2. 4. a big reddish star late in its life cycle.
  3. 6. the stage after a nebula.
  4. 7. a group of 30 or more galaxies.
  5. 9. a big ball of gas that's orange and gives us light every day.
  6. 11. the distance light travels in one year.
  7. 14. he identified the first stars outside the milky way.
  8. 15. how a star gets energy.
Down
  1. 2. something you can't see without xrays.
  2. 3. gas and dust a star is formed from.
  3. 5. the stage after a white dwarf.
  4. 8. a huge sphere that emits light and other radiation.
  5. 10. it consists of all space, matter, and energy that exists, now, in the past, or in the future.
  6. 12. a collection of millions to billions of galaxies.
  7. 13. a big explosion of a star.