People in history of Astronomy

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Across
  1. 2. built observatories on his own private island, witnessed 2 super novas that lead him to believe the heavens can change, and took the most detailed observations ever by the naked eye.
  2. 4. one of the first to make a refracting telescope and established the 3 laws of motion. Also proposed the particle theory of light.
  3. 7. establish the 3 laws of motion that explain our planets orbit stars
  4. 9. proposed the wave theory of light, first discovered the rings of Saturn, and its largest moonTitan
  5. 11. used lunar eclipses to prove the Earth is a sphere
  6. 13. discovered cepheid variable stars and calculate the distance of stars and galaxies
  7. 14. lived in the 20th century. He made important scientific studies in the fields of planetary science, he also managed to popularize astronomy
  8. 17. a 10th century Persian astronomer who made the 1st observation of the stars outside of the Milky Way, the Andromeda galaxy
  9. 18. built his own telescope, discovered the 4 moons of Jupiter, and that the Earth orbited the sun
Down
  1. 1. born in italy then moved to france in the 17th century. Discovered gaps in the rings of Saturn.
  2. 3. lived in Poland in the 16th century and proposed the sun is the center of our solar system
  3. 5. suggested the laws of physics are the same throughout the universe, that the speed of light in a vacuum is constant, and that space and time are linked in an entity known as space-time, which is distorted by gravity.
  4. 6. proposed the universe had a beginning and an ending, and tied the theories of general relativity and quantum theory
  5. 8. proposed a geocentric model of the solar system
  6. 9. determined the universe is expanding
  7. 10. proposed that, after a collision with a large body scooped, debris from the Earth coalesced into the moon.
  8. 12. siblings who studied astronomy in the 18th century. William discovered Uranus and Caroline was the 1st woman to be credited with discovering a comet and published a cataloge of 560 stars
  9. 15. reviewed historical sightings and proposed a comet that had appeared in 1456, 1531, 1607, and 1682 were all the same and would return in 1758
  10. 16. used star spectra and quantum mechanics to calculate the universe is mostly hydrogen and helium.