1. Lesson 17: The Solar System

3. INNER PLANETS 4 closest to the sun - Mercury, Venus, Earth and Mars
Also called terrestrial planets

4. Traits: Terrestrial Planets Small, but dense Rocky surface•
Made up mostly of rock and metal.
Very heavy.
Move slowly in space.
Have no rings and few moons (if any).
Have a diameter of less than 13,000 km.

5. OUTER PLANETS
4 farthest from the sun - Jupiter, Saturn, Uranus, and Neptune
Also called the Jovian planets

6. Jovian Planets Traits: Large, but not very dense Gaseous surface
Atmosphere of hydrogen and helium
Made up mostly of gases (primarily hydrogen & helium).
Very light for their size.
Move quickly in space.
Have rings and many moons.
Have a diameter of less than 48,000 km
Jovian Planets

7. But what about Pluto?!

10. TO BE A PLANET Has to be rounded by gravity Has to orbit a star
Has to have everything pushed out of its orbit
Which one does Pluto not meet?

11. 360 Pluto