Across
- 1. a theory that earth is the center of the solar system or universe
- 4. polish astronomer, wrote on the Revolution of the celestial Spheres
- 5. First person to study the sky with a telescope
- 6. German astronomer,mapped the orbits of the planets
- 7. an instrument used to view distant objects
- 9. a step-by-step method of investigation involving observation
- 10. created laws about gravity and motion
- 11. an idea or assumption to be tested in an experiment
- 12. the force of attraction between all masses
Down
- 2. a belief in reason and logic as the primary paths to knowledge
- 3. a theory that places the sun at the center of the solar system
- 8. modern science emerged as a new way of gaining knowledge