Mercury•Closest to the sun•Covered in craters•No atmosphere•No moons•Smallest planet•Rocky planet

VENUS

• Same size as Earth• Has thick clouds• Hot temperatures due to Greenhouse

Effect.• Lots of Acid Rain• Nicknames: earths twin, Goddess of

Love, Witch Star, Evening and morning star.

• No moons• Rocky planet

Earth

•Has liquid water•Contains life • Rotation on its axis is 24

hours.

• Revolution around the sun is 365.25 days

EARTH

• The earth is 93 million miles from the sun.

• Has 1 moon• Rocky Planet

• The earth is 243,000 miles from the moon.

Moon•A natural satellite orbits a planet. •Opaque: does NOT produce light but reflects light.

•Takes about a month to orbit earth.

•Has 8 phases

Mars•Known as the Red Planet•Largest volcano in solar system (called: Mount Olympus Mons)

•Has LOTS of volcanoes•(Has two moons: Phobos, Deimos)

•Rocky planet

Jupiter•Largest planet•Huge storms•GREAT RED SPOT is a 300 year old storm

•63 moons•Gas planet

Saturn•Ringed planet-rings made of rock and ice

•Has 52 moons•Lightest planet•Gas planet

Uranus•Rotates on its side

•Has rings•27 moons•Green ball•Gas planet

Neptune•Blue color•High winds, storms•13 moons•Has rings•The GREAT DARK SPOT- giant storm•Gas planet

PLUTO•Was a planet•Considered a rocky Dwarf Planet

•Changes revolution places with Neptune.

•Has 3 moons

Terms

Planetary system is:

planets, moons, and other objects that orbit a star.

Planet

A rocky or gaseous object that orbits a star.

INNER PLANETS

• Also called TERRESTRIAL PLANETS

• Mostly solid rocky bodies (Mercury, Venus, Earth, Mars)

ASTEROID BELT

•LOCATED between Inner and Outer Planets (between Mars and Jupiter)

•Made of rocks smaller than planets

OUTER PLANETS

• LOCATED OUTSIDE THE ASTEROID BELT

• CALLED GAS GIANTS (Jupiter, Saturn, Uranus, Neptune)

Our Sun, the Star

A medium size…gaseous body made up of hydrogen & helium emits energyLuminous: produces it’s own light.

Meteoroid: Rocks orbiting in space

Meteor: a rock that enters the earth’s atmosphere

Meteorite: when a rock strikes the earths surface.

ASTEROIDS: A small rocky object, orbits a planet usually found in the Asteroid Belt.

COMETS: made up of ice and dust particles, has a tail, and circles a star in an elliptical orbit.

SCIENTISTS

•GALILEO: –Created the Telescope–Saw the moons of Venus–Saw Sunspots–Father of Astronomy

SCIENTISTS

•COPERNICUS: –Discovered the earth revolved around the sun calling it heliocentric.