Modern Astronomy

123456789101112131415161718192021222324
Across
  1. 2. Proposed the idea of the heliocentric model of the solar system
  2. 5. The movement of planets in space
  3. 8. The designer of the telescope
  4. 9. Historical period of advances in astronomy
  5. 14. Scientist whose laws describe planetary motion
  6. 15. How objects behave in the universe
  7. 16. Instrument Used before telescopes to measure the angles in the sky
  8. 18. Model of the solar system with the sun at the center
  9. 23. The four largest moons of Jupiter
  10. 24. Model of the universe with Earth in the center
Down
  1. 1. Loops Used in the Geocentric model to help explain the motion of the planets
  2. 3. Developed the laws of motion
  3. 4. Believed in a geocentric universe
  4. 5. Ancient-centered model of the universe
  5. 6. Device used to observe objects in space
  6. 7. Half the longest diameter of an ellipse
  7. 10. Oval shape of planetary orbits
  8. 11. The discovery of Jupiter was made by this person
  9. 12. Shift in a star's position is used to measure its distance
  10. 13. Astronmer who used the telescope to help support the heliocentric model
  11. 17. Change in velocity over some time
  12. 19. The path an object takes around another due to its gravity
  13. 20. Detailed obsevations of the objects in the universe without the need of a telescope
  14. 21. Fixed points used to define the ellipse shape
  15. 22. An Astronomer who developed the Earth-centered model of the universe