Astronomy Extra Credit; use the book for clues.

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Across
  1. 2. areas on the Sun that are cooler and less bright.
  2. 6. large cloud of gas and dust that breaks apart and can collapse to form a star.
  3. 7. any natural or human made object that revolves around another object.
  4. 8. smallest planet, closest to the Sun.
  5. 12. _____ year; the DISTANCE light travels in one year.
  6. 13. a piece of rock or metal in space.
  7. 15. form of stars that form a pattern, given a name such as "Orion".
  8. 17. space project that put the first humans on the Moon.
  9. 18. 7th planet from the Sun; has almost a 90 degree tilt.
  10. 20. ____ ___ Spot; a higher pressure storm on Jupiter, larger than the size of Earth.
Down
  1. 1. largest and 5th planet from the Sun.
  2. 3. late stage of a star, core heats up and can eventually explode.
  3. 4. 8th planet from the Sun, bluish green in color.
  4. 5. 4th planet from the Sun, reddish in color.
  5. 8. a meteoroid that strikes a planet or moon.
  6. 9. space object made of dust and rock particles mixed with frozen water.
  7. 10. theory that states the universe began 13.7 Billion Years ago after a fiery explosion.
  8. 11. a meteoroid that burns up in Earth's atmosphere.
  9. 14. 2nd planet from the Sun; surface covered in volcanoes.
  10. 16. _____ hole; final stage of a star, gravity is so strong not even light can escape.
  11. 19. 6th planet from the Sun; has at least 31 moons