1. The Outer Planets

2. Most of the Outer planets are : Large, Gas Giants except Pluto  The Gas Giants…..and the nner planets  The Gas Giants…..and the Inner planets

3. Jupiter  Largest Planet  Atmosphere: Hydrogen and Helium  Has (at least) 64(!) known moons! (the 4 large ones are (the 4 large ones are Ganymede, Europa, Callisto, Io )  Great Red Spot (Huge Storm)  Space Probes: Voyager-Galileo  Thin ring system  Day: 10 hrs  Year: 12 Years

4. Jupiter

5. Saturn  2 nd Largest Planet  Large ring system-ice, rock, dust  About 18 Moons (18-21)  Space Probe: Voyager-Cassini  Atmosphere: Hydrogen, Helium  Titan: Moon with an Atmosphere  Day: 10 hours  Year: 29.5 years

6. Saturn

7. Uranus  About the size of Neptune Discovered by William Herschel 1781  Atmosphere: hydrogen, helium methane methane  About 15 Moons  Thin ring system  Rotates on its side  Rocky core  Voyager space probe  Day: 18 hours  Year: 84 years

8. Uranus

9. Neptune  A little smaller than Uranus  Methane atmosphere  Last planet seen by Voyager  Rocky core  8 Moons (Triton)  Thin ring system  Great dark spot  Day: 19 hours  Year: 165 years  Spins on its side!

10. Neptune

11. Pluto  “Dwarf” Planet  Icy/rocky Planetoid  5 moons  Thin atmosphere-frozen gases  Space probe: New Horizon 2015  Pluto was recently classified as a dwarf planet, NOT a planetoid!  Day: About 6 Earth days  Year: 248 Earth Years (tilted orbit)

12. Pluto