Across
- 2. Heliocentric model proponent
- 5. Laws of planetary motion developer
- 8. Mathematician portrayed in "A Beautiful Mind"
- 9. Naturalist who proposed evolution theory
- 10. Subatomic particle with no charge
- 12. Force pulling objects toward each other
- 15. Nuclear reaction combining atoms
- 16. The universe as a whole
- 17. Negatively charged subatomic particle
- 20. Scientist who formulated laws of motion
Down
- 1. Space telescope launched in 1990
- 3. Former ninth planet
- 4. Physicist known for quantum mechanics
- 6. Physicist who wrote "A Brief History of Time"
- 7. Developer of the theory of relativity
- 11. Co-discoverer of DNA structure
- 13. Inventor and electrical engineer
- 14. Fundamental particle in physics
- 18. Pioneer in computer science
- 19. Father of genetics