Life and death of a Star

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Across
  1. 5. star brightest star, white/blue mass 100 times the sun
  2. 7. collapsing due to gravity,massive explosion visible for months
Down
  1. 1. beginning of all stars
  2. 2. dwarf, small shrunken remains of stars
  3. 3. star our sun produces own heat and light ,lives billion years
  4. 4. Star After supernova faints ,cannot be seen with visible light
  5. 6. hole left over gravity,light cannot escape ,4 times the size of the sun
  6. 8. giant Nearing end of stars life, before white dwarf