Across
- 2. Proposed the idea of the heliocentric model of the solar system
- 5. The movement of planets in space
- 8. The designer of the telescope
- 9. Historical period of advances in astronomy
- 14. Scientist whose laws describe planetary motion
- 15. How objects behave in the universe
- 16. Instrument Used before telescopes to measure the angles in the sky
- 18. Model of the solar system with the sun at the center
- 23. The four largest moons of Jupiter
- 24. Model of the universe with Earth in the center
Down
- 1. Loops Used in the Geocentric model to help explain the motion of the planets
- 3. Developed the laws of motion
- 4. Believed in a geocentric universe
- 5. Ancient-centered model of the universe
- 6. Device used to observe objects in space
- 7. Half the longest diameter of an ellipse
- 10. Oval shape of planetary orbits
- 11. The discovery of Jupiter was made by this person
- 12. Shift in a star's position is used to measure its distance
- 13. Astronmer who used the telescope to help support the heliocentric model
- 17. Change in velocity over some time
- 19. The path an object takes around another due to its gravity
- 20. Detailed obsevations of the objects in the universe without the need of a telescope
- 21. Fixed points used to define the ellipse shape
- 22. An Astronomer who developed the Earth-centered model of the universe