Star Party

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Across
  1. 4. not even light can escape this or it is so dense that gravity just beneath its surface
  2. 5. white dwarf that has cooled down
  3. 9. heavy elements are only produced in this if it was in a bulk
  4. 10. stand out from the rest are 30 to 100 times more massive and brighter than the sun
  5. 11. hydrogen fusion begins moving into the star's outer layer
Down
  1. 1. eight times massive as massive as our own sun or it can turn out to be 12 to 13 billion years old
  2. 2. glowing shells of gas and dust ejected by dying
  3. 3. make up around 90% of the universes stellar population
  4. 6. a "baby star" in its earliest stage
  5. 7. cloud, gas and dust
  6. 8. ancient remnants of Stars or they pack an extremely strong gravitational pull