1. The Solar System

3. Speeds

4. One light year (distance light travels in one year) is 6 trillion miles or 9 trillion kilometers
Light can travel around the equator 7 times in one second

5. Light can go around the equator 7 times in one second!

6. The time it takes light from the Sun to reach Earth 93 million miles away is 8 minutes

7. It takes the Sun’s light 8 minutes to travel the 93 million miles to Earth!

8. What is retrograde motion?
When a planet with a smaller orbit passes a planet with a larger and slower orbit
That planets path will appear to change direction in the sky over a course of several weeks

9. The Inner Planets Terrestrial Planets = “Earth-like”
Mercury, Venus, Earth, & Mars

10. Relatively small
Made up of solid rock
High Densities
Few moons, if any

11. Mercury

12. Venus

13. Hottest planet in the solar system
Atmosphere made up of mostly Carbon Dioxide
Carbon dioxide lets Visible light in and traps Infrared heat energy

14. Earth

15. Mars

16. Martian Landscape

18. Olympus Mons

24. Jovian Planets

25. The Outer (Jovian) Planets
Gas giants
Many moons
Rings
Low densities (gas)
Mostly Hydrogen

26. Jupiter

28. Saturn

29. Saturn & it’s Moons

30. Saturn’s Rings

32. Uranus

34. Neptune

35. Neptune’s Dark Spot

36. Obliquity of Nine Planets
Eight
Obliquity is the axial tilt or inclination of a planets rotation

37. Pluto

39. The orbits of Pluto and Neptune cross each other

40. Where does Pluto fit in?
Pluto, dwarf planets and comets are all found in the Kuiper Belt

42. The Oort Cloud

43. Small bodies of rock, iron and frozen water and gases that orbit the sun in very elliptical orbits.
Comet

44. Comets have very Elliptical Orbits

45. Comet Shoemaker-Levy 9 colliding with Jupiter (JULY 1994)

46. Halley’s Comet

47. What are Meteor Showers?
Meteor showers are the remains of a comets tail entering the earth’s atmosphere