The Inner Planets of Our Solar System
Download
Report
Transcript The Inner Planets of Our Solar System
Warm-Up 4/30
Throwback Thursday
• How does each rock form?
– Sedimentary
– Metamorphic
– Igneous
Get out your Load the Shuttle questions if you
did not turn in yesterday.
Celestial Objects in our
Solar System
Celestial- positioned in or relating to
the sky, or outer space as observed in
astronomy
Essential Vocabulary
Rotation – the time it takes to spin on
its axis
This makes one DAY
Revolution – the time it takes to orbit
the sun once
This makes one YEAR
http://www.classzone.com/books/earth_science/terc/content/visual
izations/es0408/es0408page01.cfm?chapter_no=visualization
The Inner Planets
• Mercury, Venus, Earth and Mars
• Known as terrestrial planets because
they are made of rock
The Outer Planets
Jupiter, Saturn, Uranus, and
Neptune
Gas Giants – composed
mostly of Hydrogen and
Helium
The Sun
A ball of glowing gas!
Largest thing in our
solar system
– 99.8% of the mass
of the solar system
The Moon
Our moon is named Luna
The moon is a natural
satellite.
– A satellite is anything that
orbits something else.
Galilean Moons
The largest of the
63 moons of Jupiter
Discovered by Galileo
Galilei on Jan. 7, 1610
Galilean Moons
Among the most massive rocky objects in the
Solar System, with a radius larger than Mercury
or any of the dwarf planets.
Galilean Moons
Io the most geologically active object in the Solar System
Europa has a layer of ice
Ganymede largest natural satellite in the Solar System
and has a salt water ocean and oxygen in it’s
atmosphere. Larger than Mercury.
Callisto may have possibly a subsurface ocean of liquid water
Meteoroids
Meteoroids are rocky
fragments of comets,
planets, moons, or
asteroids.
Travel through space
without an orbit.
Meteors
Meteors that have
entered an atmosphere
Friction with the
molecules in the
atmosphere cause it to
burn
Commonly called
“shooting stars”
Meteorites
Any part of a meteoroid
that survives passage
through the atmosphere
and lands on the surface a
planet or moon.
Largest meteorite found on Earth
Hoba, Namibia
Comets
Mixture of ices (both water and frozen
gases) dust, and rocks
Have an elliptical orbit around the sun
Asteroids
Left over materials from
the formation of the Solar
System
Composed of rock or
metal
Smaller than a planet but
larger than a meteor
Asteroid Belt
Most asteroids
are located in
the asteroid belt
between Mars
and Jupiter
Video
Asteroids, Comets, and Meteors