Stars

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Across
  1. 4. / beginning stage of a star made of dust and gas
  2. 7. / the largest black holes which are at the center of most galaxies
  3. 11. / are remnants of stars that have reached the end of their life
Down
  1. 1. / explosion of a supergiant star
  2. 2. / Black holes formed by the collapse of individual stars are relatively small, but incredibly dense
  3. 3. / a neutron star that emits radiation pulses
  4. 4. / are formed when a red giant forms from a main sequence star and a red giant sheds its outer layers that is why they have a circular shape
  5. 5. / the brightness by which stars are measured
  6. 6. / a star with a high density and lumosity
  7. 8. / the point near a black hole in which nothing can escape
  8. 9. / a dull star with a low density
  9. 10. / ______: the force that pulls together dust and gas to form the core of stars