History of Astronomy

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Across
  1. 3. discovered Pluto and the Kuiper belt in the 1930s
  2. 6. woman who discovered pulsars which emit a bean of electromagnetic radiation
  3. 7. Revised the geocentric model of the universe to include epicycles
  4. 10. created the first astronomical catalog in 1771 that contained 110 objects
  5. 12. discovered 4 moons of Saturn: Lapetus, Dione, Rhea and Tethys
  6. 14. Greek astronomer that used the sun to measure the size of the round Earth
  7. 15. discovered the theory of supernova and dark matter
  8. 19. Belgian Catholic priest who is credited with developing the Big Bang Theory
  9. 20. Danish astronomer who used mathematical equations to figure out the distance to the planets
  10. 21. modern physicist who studies quantum mechanics and wrote the book A Brief History of Time
  11. 22. discovered a huge spherical cloud of icy comets named after him
  12. 23. discovered the orbit of a comet that could be seen from earth every 76 years
Down
  1. 1. made discoveries of galaxies including Andromeda Nebula and has a telescope named after him
  2. 2. proposed the first model of the universe that put the sun at the center
  3. 4. Greek astronomer that made the first catalogue of the stars, mapping over 850 stars
  4. 5. discovered infrared radiation and the planet Uranus
  5. 8. provided an explanation for Saturn’s rings and discovered its moon, Titan
  6. 9. Greek philosopher that created the first model that put the Earth at the center
  7. 11. discovered the largest asteroid Ceres
  8. 13. started the SETI program and created the original TV series Cosmos in the 1980s
  9. 16. Tycho Brahe’s assistant and calculated three laws of planetary motion
  10. 17. discovered the four main moons of Jupiter and helped invent the first telescope
  11. 18. famous for his worm on forces, specifically gravity
  12. 20. discovered Trans-Neptunian Objects (TNOs) also known as dwarf planets