Download planets finalized - Hewlett

Welcome to our solar system
Planet
Planet means to wander.
Planets change position against the background
of motionless stars.
Planet- the largest object in the solar system that
independently orbit the Sun
There are 8 known planets in our solar system.
Inner Planet
Second Smallest
Rocky
Craters
No Moons
88 day orbit time
Wide temperature range
4,880 Equatorial Diameter
Closest to the Sun
Inner Planet
Sixth Largest
Rocky
Volcanic Action
No Moons
225 day orbit time
400o C Surface Temperature
12,104 Equatorial diameter
Second Closest to Sun
Inner Planet
Fifth Largest
Rocky
Mountains
One Moon
365 day orbit time
Seasonal Temperatures
12,756 Equatorial diameter
Third Closest to Sun
Inner Planet
Seventh Largest
Rocky
Polar Caps
Two Moons
687 day orbit time
Below Zero Temperatures
6,787 Equatorial diameter
Fourth Closest to Sun
Formation of Terrestrial Planets
In the inner solar system planets grew
more slowly out of less material mostly
rock
Result is small rocky planets with no
large gassy outer layer
Outer Planet
Largest Planet
Gas Composition
similar to the sun
52 Moons
Faint Rings
11.9 year orbit time
Great Red Spot
142,800 Equatorial diameter
Fifth Closest to Sun
Giant Red Spot
Huge atmospheric “storm” on Jupiter
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has existed for centuries
visible via telescope on Earth
important source of data on atmospheric
behavior
Also, Giant Dark Spot on Neptune
Outer Planet
Second Largest
Gas Composition
Ice and Rock Rings
18 Moons
29.5 year orbit time
Lighter than Water
120,000 Equatorial diameter
Sixth Closest to Sun
Outer Planet
Third Largest
Gas Composition
Rock and Ice Surface
21 Moons
Thin Faint Rings
84 year orbit time
Axis of rotation is tipped over
tilted at 98o
Seventh Closest to Sun
Outer Planet
Fourth Largest
Gas Composition
Faint Rings
8 Moons
164.8 year orbit time
Blue Color from Methane Gas
49,500 Equatorial diameter
Eighth Closest to Sun
Outer Planet
Smallest
Rocky
Lays on its Side
1 Moon
Irregular Orbit
248 year orbit time
2,300 Equatorial diameter
Ninth Closest to Sun
Inner vs. Outer
Planets
Inner Planet
*small
*close to the sun
*solid surface
*thin atmospheres
*no rings
*few or no moons
Outer Planets
*large
*far from the sun
*gas surface
*thick atmosphere
*have rings
*many moons
http://www.numbersleuth.org/uni
verse/
Geocentric Model
The geocentric model (geo = earth and centron =
centre) Earth is the center of the solar system. Aristotle
,Ptolemy and Most Greeks assumed that the Sun, Moon,
star and Planets orbit Earth.
Heliocentric model
A heliocentric system is one in which the planets revolve
around a fixed sun. Thus Mercury, Venus, the Earth,
Mars, Jupiter and Saturn all revolve around the sun
Asteroids
Asteroid Facts
Composed of materials similar to those
that later formed planets – mainly Fe
Most located in the asteroid belt between
Jupiter and Mars – some have escaped
because of gravity
Approximately 250 cross Earth’s orbit
May have caused dinosaur extinction
Meteors, Meteorites, Meteoroids
Meteoroids , Meteors and
Meteorites
Meteoroids- fragments of rock or ice traveling in
space
Meteors- “shooting stars”, are streaks of light
caused by meteoroids passing through our
atmosphere
Meteorites- a meteoroid that is large enough to
reach Earth’s surface
Meteor showers – when Earth passes through
the orbit of a comet many meteors fall to Earth.
Comets
Comet Facts
Composed of dust and rock particles
mixed with ices of water, methane, and
ammonia
Highly elongated elliptical orbits
Thought to originate beyond the orbit of
Pluto, pulled in by the sun’s gravity
Comets get brighter as they approach the
sun because the ices started to vaporize.
Tail always points away from the sun.
The End