Cros 2

123456789101112131415161718
Across
  1. 4. Formulated Big Bang theory and predicted cosmic microwave background
  2. 6. Developed stellar classification system
  3. 8. Formulated laws of planetary motion
  4. 9. Contemporary science communicator and astrophysicist
  5. 13. Laws describe geometry of planetary orbits
  6. 14. Crucial work for measuring cosmic distances
  7. 15. Proposed Chandrasekhar limit for white dwarf stars
  8. 16. Provided evidence for the universe's expansion
  9. 17. Provided evidence for the existence of dark matter
  10. 18. Discovered Pluto, later reclassified as dwarf planet
Down
  1. 1. Known for telescopic observations
  2. 2. Popular science communicator and author
  3. 3. Laid foundation for classical mechanics
  4. 5. Made extensive astronomical observations
  5. 6. Name used for a temperature scale
  6. 7. Proposed heliocentric model of the Solar System
  7. 10. First recognized American female astronomer
  8. 11. Discovered Saturn's moon Titan and contributions to optics
  9. 12. Hubble Space Telescope named after him
  10. 14. Discovered Cepheid variables' use in distance measurement