1. Early Models and Astronomers Planets May the Force be with you Shoot for the Moon Objects in Space 100 200 300 400 500

2. Model where planets revolve around the Earth Answer

3. Geocentric Home

4. Answer The moon’s crust is mainly made of these two features:

5. Home Anorthrosites and Maria

6. Who proposed the Heliocentric model? Answer

7. Copernicus Home

8. The law that describes the path of a planet that orbits the sun is called ________ Answer

9. Law of Ellipses Home

10. What astronomer said planets moved in epicycles, which are little circles as they went around Earth? Answer

11. Ptolemy Home

12. What is the least dense planet that also has bands and rings made of dust and ice? Answer

13. Home Saturn

14. What is the largest planet in the solar system? Answer

15. Jupiter Home

16. Planet who’s axis is almost parallel to its plane of orbit Answer

17. Uranus Home

18. What planet gets its color from large amounts of methane? Answer

19. Uranus Home

20. What 2 inner planets are most alike in their size and mass? Answer

21. Home. Venus and Earth

22. Degree of elongation of an elliptical orbit Answer

23. Eccentricity Home

24. Answer The time required for a body to complete a single orbit

25. Home Orbital Period

26. Force that PULLS on a body in space Answer

27. Gravity Home

28. What is a bright streak of light that results from a meteoroid burning up in our atomosphere? Answer

29. Meteor Home

30. Pattern in which is appears as though the planets are moving backward relative to the stars Answer

31. Retrograde Motion Home

32. Answer The force of gravity between Earth and moon cause _____ in bodies of water

33. Tides Home

34. Dark areas on the moons surface Answer

35. Mare Home

36. When the lighted part of the moon appears to increase, the moon is said to be __________. Answer

37. Waxing Home

38. This occurs when the shadow of one celestial body falls on another celestial body Answer

39. Home Eclipse

40. Answer What do we call the fine, smooth dust on the moon?

41. regolith Home

42. Fragments of rock that orbit the sun Answer

43. Asteroid Home

44. Small bodies of ice, rock and dust that follows highly elliptical orbits around the sun Answer

45. Comets Home

46. Any part of a meteoroid that didn’t burn up when entering the Earth’s atmosphere and reached Earth’s surface Answer

47. Meteorite Home

48. Region that starts beyond Neptunes orbit which contains dwarf planets and other small bodies of ice Answer

49. Kuiper Belt Home

50. Large cloud of dust and ice believed to hold nuclei of billions of comets and possible origin of our comets Answer

51. Oort Cloud Home