Universe

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Across
  1. 3. Color of star that is the coolest
  2. 6. Color of star that is the hottest
  3. 7. first element present in our universe
  4. 9. Planet known as the Red Planet because of its red rocky surface
  5. 11. The sun is a...
  6. 12. Planet known as Earth's twin because it is similar in size
  7. 14. name of the largest stars
  8. 15. Pluto is considered to be a _____ planet
  9. 16. an object that orbits a planet
  10. 19. force that helped with the formation of the sun and planets
Down
  1. 1. A large group of stars, gas, and dust is called a ...
  2. 2. The color of a star depends on its
  3. 4. Majority of the universe is made of this type of energy
  4. 5. Smallest planet in the solar system
  5. 8. Process that provides the energy for stars
  6. 10. A star is born in a cloud of gas and dust called a ...
  7. 13. Name of the scientific theory that explains how the universe was created
  8. 17. Our Sun and solar system lies within the ____ arm of the Milky Way galaxy
  9. 18. Name of the only planet that supports life (so far)