1. THE OUTER PLANETS

2. WHAT DO THEY HAVE IN COMMON? Which is the biggest planet? Which has the longest ‘day’? Which has the longest ‘year’? Which has the most moons?

3. WHAT DO THEY HAVE IN COMMON? Called gas giants because the do not have a solid surface. Extremely strong gravitational pull. All have many moons. Much of the planet is actually liquid. All have many moons. All have rings. Thick, dense atmospheres.

4. JUPITER Largest planet. Great Red Spot is actually a storm. 62 known moons. Faint rings.

5. JUPITER’S MOONS

6. SATURN 2 nd largest planet. Similar atmosphere to Jupiter, but less violent. Dramatic rings. 62 known moons.

7. SATURN’S MOONS

8. URANUS Twice as far from the sun as Saturn. Blue-green color from methane in atmosphere. Axis of rotation is tilted 90 o from the vertical. 27 known moons. Very faint rings.

9. URANUS’ MOONS

10. NEPTUNE Blue-green color comes from high concentration of methane in the atmosphere. Interior of the planet is hot, causing clouds and storms in the atmosphere. 13 known moons. Faint rings.

11. NEPTUNE’S MOONS