Astronomy Crossword

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Across
  1. 1. Mercury, _______, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto
  2. 3. The astronomer who developed the three laws of planetary motion
  3. 7. _______ measures how flat an eclipse is.
  4. 8. year The distance travelled by light in one year
  5. 11. Model of our solar system that is centered around the Sun
  6. 12. The turning of a celestial body around an axis at its center
  7. 13. William Herschel discovered this planet in 1781.
  8. 15. There are 88 _______ officially recognized by the International Astronomical Union.
Down
  1. 2. The Zodiac are located in a band around the _______.
  2. 4. Earth’s _______ around the sun takes one year.
  3. 5. Model of our solar system that is centered around the Earth
  4. 6. The investigation of the astronomical knowledge of prehistoric cultures
  5. 9. The tendency of a body at rest to remain at rest and a body in motion to remain in motion
  6. 10. light _______ is the part of the EM spectrum that is visible to the human eye.
  7. 14. waves _______ have the longest wavelength on the EM spectrum.