1. Meteoroids, Asteroids, & Comets

2. Meteoroids  Definition  Size  Meteors  Meteorites

3. Meteoroids Space Rocks. Rocky and/or Metallic. Most are left over from the formation of the solar system (~4.6 billion years ago)

4. Meteoroids

5. Meteoroid – A rock in space. Meteor – A space rock entering our atmosphere (shooting star). Meteorite – When it hits the Earth.

6. Meteoroids

10. Earth travels through the left over pieces from a comet.

11. Meteoroids

15. Barringer Crater

16. Meteoroids

18. ebay

19. Meteoroids

20. Asteroids  Definition  Size & Location  Exploration

21. Asteroids Space Rocks. Rocky and/or Metallic. Bigger than Meteoroids; generally between Mars and Jupiter.

22. Asteroids

26. Exploration Asteroid Gaspra in 1991

27. Asteroids Exploration Asteroid Eros in 1997

28. Asteroids Exploration Eros landing in 2001 250 yards above the surface

29. Asteroids Dawn Spacecraft

30. Asteroids

31. Dawn Spacecraft Visits Ceres in Feb of 2015

32. Asteroids Dawn Spacecraft Visits Ceres in Feb of 2015

33. Asteroids

34. Comets  Definition  Size & Parts  Types  Exploration

35. Comets Space Rocks. Icy & Rocky; Dirty Snowballs. House size to 10 s of miles.

36. Comets

39. As the comet nears the Sun, solar winds and heat melt ice which shoots off the comet like jets of gas.

40. Comets

42. In 1705, Edmond Halley (1656–1742) applied Newton's method to twenty-three cometary apparitions that had occurred between 1337 and 1698. He noted that three of these had very similar orbital elements. Confident that these three apparitions had been three appearances of the same comet, he predicted that it would appear again in 1758. Halley's predicted return date was later refined by a team of three French mathematicians, who predicted the date of the comet's 1759 return to within one month's accuracy. When the comet returned as predicted, it became known as Halley's Comet. It will next appear in 2061.

43. Comets