Astronomy Crossword

5. discovered a belt of comets at the edge of Pluto’s orbit named after him
6. discovered the four main moons of Jupiter and helped invent the first telescope
8. discovered a huge spherical cloud of icy comets named after him
9. discovered the theory of supernova and dark matter
12. modern physicist who studies quantum mechanics and wrote the book A Brief History of Time
14. Greek philosopher that created the first model that put the Earth at the center
16. along with Ejnar Hertzsprung, invented a diagram to classify stars
17. discovered Pluto in the 1930s
18. woman who discovered pulsars which emit a bean of electromagnetic radiation
19. provided an explanation for Saturn’s rings and discovered its moon, Titan
21. discovered Trans-Neptunian Objects (TNOs) also known as dwarf planets
22. discovered the orbit of a comet that could be seen from earth every 76 years
23. German scientist who was the first astronomer to discover Neptune

1. woman who discovered that a star know as a Cepheid could be used as a marker for distance
2. famous for his work on forces, specifically gravity
3. Greek astronomer that made the first catalogue of the stars, mapping over 850 stars
4. created the first astronomical catalog in 1771 that contained 110 objects
7. discovered the largest asteroid Ceres
10. discovered 4 moons of Saturn: Lapetus, Dione, Rhea and Tethys
11. Revised the geocentric model of the universe to include epicycles
13. Tycho Brahe’s assistant and calculated three laws of planetary motion
15. started the SETI program and created the original TV series Cosmos in the 1980s
19. made discoveries of galaxies including Andromeda Nebula and has a telescope named after him
20. Danish astronomer who used mathematical equations to figure out the distance to the planets