Astrology/Cosmology Review

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Across
  1. 6. High mass stars that are massive, but not massive enough to form Black Holes, leave behind a __________ star.
  2. 7. To spin in a circle around an axis.
  3. 9. The most massive stars leave behind a _________.
  4. 11. A low mass star leaves behind a _________ nebula.
  5. 12. A cloud of gas and dust in space.
  6. 15. The model that put the Earth at the center of the Universe.
  7. 17. Came up with the Sun-centered model.
  8. 19. Nuclear _______ occurs in the core of a star when Hydrogen is combined to create Helium.
  9. 20. The stage of the star life cycle right before the star ignites.
Down
  1. 1. A high mass star explodes in a massive ____________.
  2. 2. The name of the theory that explains the origins of the Universe is the ____________ Theory.
  3. 3. The model that put the Sun at the middle of the Universe.
  4. 4. Came up with the Earth-centered model.
  5. 5. When a star begins to run out of fuel, it grows larger forming a ___________.
  6. 8. Near the end of its life, a low mass star forms a tiny white star called a ____________.
  7. 10. The middle part of a star's life.
  8. 13. At the very end of its life, a white dwarf will become a _____________.
  9. 14. To move around something in a circle-to orbit.
  10. 16. The Big Bang was an __________.
  11. 18. The seasons are caused by Earth's _______.