Science crossword

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Across
  1. 3. Outer layer of a red giant creates a cloud of gas and dust.
  2. 4. Gravity is so strong here that light can't even escape.
  3. 6. Cloud of dust and gas that forms protostars
  4. 7. Hot and dense star, what our star will eventually become.
  5. 9. A star made of only neutrons.
  6. 10. A star after the main sequence.
  7. 11. A star that could become a black hole.
Down
  1. 1. The stage of a star where a star will spend most of its life.
  2. 2. Theoretical stage of a star after the white dwarf
  3. 5. Dense part of a stellar nebula that produces heat and light
  4. 6. When a star explodes.
  5. 8. Two atoms form together and form another element