The Solar System

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Across
  1. 5. Formulated three laws to accurately predict planetary motion
  2. 7. The ancient model of the universe with Earth at the center
  3. 9. The circular shaped movement around a celestial body
  4. 10. Large and gaseous planets with strong gravities
  5. 14. Wrote the book call 'The Revolutions', was credited with creating heliocentric theory
  6. 15. An object that appears to be slow down, stop, and back up
  7. 17. A meteoroid in Earth's atmosphere
  8. 18. A meteor that strikes the surface of Earth
  9. 19. Built precise instruments to measure the movement of celestial bodies and mentored Kepler
  10. 20. Very similar to planets, but, due to their size, share their orbits
  11. 21. Made of different ices that sublimate when it gets closer to the sun
  12. 22. Observed and studied various celestial bodies using the telescope
Down
  1. 1. Comes from the Greek word planetos, meaning wanderer
  2. 2. Smallest asteroids in space - from the size of a grain of sand to 1 meter
  3. 3. The idea that the sun is the center of our solar system
  4. 4. Includes the sun and the objects that its gravity holds around it
  5. 6. a slightly flattened circle and the true shape of a planets orbit around the sun
  6. 8. Something in the solar system which is not a planet, moon, or dwarf planet
  7. 11. Rocky planets with densities similar to Earth
  8. 12. Studied the motions of the moon around Earth and developed a mathematical law to describe gravitational force
  9. 13. A natural satellite of a planet
  10. 16. The largest SSSB in the solar system