History of Astronomy

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