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