life cycle of a star

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Across
  1. 3. star The beginning steps in the life cycle of a massive star include the stellar nebula, protostars, and then the main sequence stage Then the massive stars become supergiant
  2. 5. fuse hydrogen atoms to form helium atoms in their cores. About 90 percent of the stars in the universe including the sun
  3. 7. white dwarf
  4. 8. collection of interstellar medium gas & dust found between stars
  5. 10. he property of a body that is a measure of its inertia and that is commonly taken as a measure of the amount of material it contains and causes it to have weight
  6. 11. after giant stage rest the same as low mass
  7. 12. a dense cluster of interstellar medium within a nebula
Down
  1. 1. low mass red dwarf star
  2. 2. collapses to no radius density and gravity become infinite no escape
  3. 4. star last for billions of years These stars end when they gradually shed off their outermost layers
  4. 6. A few solar mass star condensed to a radius of 10km
  5. 9. star found on the HR Diagram it is found to the lower left