Ch.20 The Solar System

Section 4: The Inner Planets

Section 4

• Gas Giants & Pluto– The four outer planets – Jupiter, Saturn, Uranus, &

Neptune – are much larger and more massive than Earth, and they do not have solid surfaces

– Gas giants– Ring

Section 4

• Jupiter– The largest and most massive planet– Jupiter’s Atmosphere– Jupiter’s Structure– Jupiter’s Moons

Section 4

• Saturn – Saturn’s Rings• Has the most spectacular rings of any planet

– Saturn’s Moons

Section 4

• Uranus– Discovery of Uranus– Exploring Uranus• Uranus’s axis of rotation is tilted at an angle of about 90

degrees from the vertical

– Uranus’s Moons

Section 4

• Neptune– Is a cold, blue planet. Its atmosphere contains

visible clouds– Discovery of Neptune– Exploring Neptune– Neptune’s Moons

Section 4

• Pluto– Has a solid surface and is much smaller and denser

than the outer planets– Pluto’s Orbit– Dwarf Planets