Star formation

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Across
  1. 2. when the force of gravity is so great light can not escape
  2. 3. What a star, similar to our sun, will turn into after the redgiant
  3. 5. Dead star which is no longer hot or bright
  4. 7. Neutron stars can give out electromagnestic radiation called ????
  5. 8. In a main sequence star the outward force, due to fusion is balanced with this force
  6. 9. The dying stage of a star, they become larger and change colour.
  7. 11. An explosion caused by the collapse of a red giant
  8. 12. collapses gases in the nebula, but no nuclear fusion
  9. 13. core of red giant which has collapsed.They can spin on their axis really fast
Down
  1. 1. The sun is one of these. It is in the steady period of its life.
  2. 4. The element which fuses together to make helium
  3. 6. A pattern of stars which makes up an perceived image
  4. 10. Where stars are formed