Across
- 5. Believed the Earth was round and said that Earth is the center of the universe but does not move since we do not notice a stellar parallax.
- 6. The further away a galaxy is from Earth, the faster it is moving away from Earth. The Universe is expanding.
- 9. The first scientist to actually experiment, rather than just reason and built the first telescope and saw moons around Jupiter.
- 12. Described the Earth as spherical and divided into circles
- 13. Developed astronomy as a branch of mathematics.
- 14. Created calculus mathematics and discovered the laws of gravity and motion
Down
- 1. Accidentally discovered Cosmic Background Radiation
- 2. Discovered that the Earth slowly wobbles as it rotates
- 3. Proved that the night sky changed and evolved when he discovered a comet in 1572
- 4. Discovered that the orbits of planets are ellipses and the three laws of planetary motion
- 7. Ancient Greek who was the first to describe "retrograde motion"
- 8. Calculated the circumference of the Earth
- 10. Discovered many of the trigonometric formulas and star names that we use today
- 11. The first medieval monk to develop a heliocentric model of the universe