SOLAR SYSTEM

By: William Meng

Revolve?Revolve means for a smaller object to

move around a larger object.

Planets revolve around the sun.

Rotation• Rotate is similar to spinning. When a

planet rotates, its spins itself on its

axis.

The Earth Rotates

Difference between Inner and Outer Planets• Inner planets are inside asteroid belt,

Outer planets are outside of asteroid

belt.

• Inner planets are smaller than outer

planets

• Inner planets are mostly made of

rock, outer planets are mostly made

of gas.

Craters in inner planets?• There are more craters in the inner

planets because sun’s gravity

attracts asteroids from the asteroid

belts to the inner planets.

Orbit• Orbit is the path a planet/satellite

follows when it revolves around a

larger object.

This Satellite orbits around the sun.

A Planet

• A planet needs to have:

• Large enough so the gravity is strong

enough to make the planet round

• Orbits around the sun

• Cleared out its path

Dwarf Planet

• A dwarf planet is similar to a planet.

• It is large enough so the gravity is

strong enough to make the planet

round and orbits around the sun

• But it has not yet cleared its path

The 13 planets?

• Mercury, Venus, Earth, Mars

Inner planets

• Jupiter, Saturn, Uranus, Neptune

Outer Planets

• Pluto, Ceres, Eris

Dwarf Planets

Solar System Picture

MERCURY

• Mercury is the closest planet to the sun

• Helium and sodium are found on its

atmosphere.

• Impact cratering, volcanism, and tectonic

activity shaped Mercury.

• Has a very thin atmosphere because its

gravity is too weak.

VenusIt is the brightest planet in the solar

system.

Carbon dioxide and sulfuric acid could

be found on its atmosphere.

It is the only planet that rotates clockwise

Days are longer than years because it takes longer for Venus to rotate

once than revolve around the sun

once.

Venus is also the hottest planet

because it has a lot of greenhouse gas in its atmosphere.

EarthTwo main things that make up Earth’s atmosphere• Nitrogen• Oxygen

Two things Earth Protects us from• Solar Radiation• Tiny Meteors

Physical Features• 23.5 degree tilt• The rapid spin of the Earth along with the liquid, hot

metallic core creates a magnetic field.

The Moon

Moon. Earth’s only satellite and companion

Mars