Astronomers

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Across
  1. 2. who was burned at the stake by the Church for his heliocentric views?
  2. 5. who published the general theory of relativity?
  3. 7. who built his own telescope and eyepieces that were advanced enough to have a magnifying power of 6,450 times?
  4. 9. who was the first geocentric believer, who also proved the Earth was spherical?
  5. 10. who calculated the circumference and the radius of the Earth?
  6. 12. who’s model contained epicycles and a motionless Earth?
  7. 14. who was put on house arrest for his views of the universe and not forgiven by the church until the late 1900's?
  8. 15. who built an observatory, with no telescopes, and made accurate and continuous measurements for 20 years?
  9. 17. who was the first heliocentric believer and attempted to measure the relative distances between the Earth and the Sun and the Earth and the Moon?
  10. 18. Who accidentally discovered the cosmic microwave background radiation, CMB?
Down
  1. 1. who developed the Doppler Effect, or Red shift?
  2. 3. who founded The Laws of Motion and the Universal Law of Gravitation?
  3. 4. who discovered that the Moon shines by reflecting sunlight?
  4. 6. Who's diagram is a graph which has the absolute magnitudes (actual brightness) of stars?
  5. 8. who developed the Laws of Planetary Motion?
  6. 11. who’s heliocentric model was not the first ever, but the first to become famous?
  7. 13. who completed the first star catalog and brightness scale, and figured out the precession, or wobble, of the Earth’s axis?
  8. 16. who developed the famous OBAFGKM spectral classification?