1. The Outer Planets Also called the Jovian planets or gas giants.

2. Similarities  Mainly composed of gas  Somewhere at the center is a core of liquid metals.  The outer planets all have numerous moons & rings  All of the outer planets’ atmospheres contain hydrogen and helium

5. All the planets except Mercury & Venus have moons

6. Mars’ 2 Moons PhobosDeimos

7. Galilean Moons of Jupiter Seen by Galileo with his telescope.

8. Jupiter Mass = 300x Earth’s mass. Jupiter has the most moons – 63+ Jupiter is one of the brightest objects in the sky Has a very stormy atmosphere. – One major storm, the Great Red Spot, is as big as the Earth.

10. “Io” – the most volcanically active body in the solar sytstem It is being pulled apart by Jupiter’s gravity.

12. Saturn Has distinctive, large rings. – Although all of the outer planets have rings, Saturn’s are the most visible ones. Has the lowest density of any planet in our solar system

15. Uranus It is the only planet to rotate on its side like a bowling ball – Scientists are unsure why it rotates that way,

16. Uranus

18. Neptune

19. Neptune’s winds are the fastest of any planets in the Solar System –Can reach more than 1,200 mph. Neptune and Uranus contain ices of water, ammonia, and methane. The methane in Neptune and Uranus is what gives the planets their blue color.

20. Pluto

21. The 3 criteria to be a full-sized planet are: 1- It is in orbit around the Sun. 2- It has sufficient mass to assume hydrostatic equilibrium (a nearly round shape). 3- It has "cleared the neighborhood" around its orbit.