Stars and igewrgiererrhgthtrhutrygifvryir u not guessing this btw

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Across
  1. 2. Fusion reaction convert hydrogen to helium.
  2. 4. Formed when Low mass star has exhausted its central nuclear fuel
  3. 5. Violent Explosion
  4. 7. Type of Neutron star
  5. 9. Spin remains constants unless acted upon by external torque
  6. 10. Electrons that cannot be packed any closer together
  7. 11. Cosmic gas and dust formed together.
Down
  1. 1. White Dwarfs, Neutron stars, and black holes
  2. 2. Studied evolution of the stars
  3. 3. Density high neutrons cannot be packed closely together anymore
  4. 6. Longest Living Stars
  5. 8. System consisting of two parts
  6. 12. Sudden large increase in brightness of a star