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Space Distances
Since distances in space are so vast, we need
to use the astronomical unit, which is
abbreviated AU.
One AU is equal to 150 million kilometers.
This is the average distance between the
Earth and the sun.
My Very Excellent Mother Just Served Us
Nine Pies.
 Are made of dust and frozen gases
such as ice
 When a comet that travels near
the sun, the radiation vaporizes
some of the dust and gas creating
a tail
Is a small rocky planet with a frozen crust
Its moon, named Charon, is nearly half its size
In 2006, Pluto was classified as a dwarf planet
Crosses orbits with
Pluto so at times
Neptune is farthest
from the sun
 Is a big gas giant with
 Has a methane
atmosphere, which
makes it a blue-green
Its axis of rotation
is almost even
with its plane of
 It has a ring
system and many
Is best known for its elaborate ring system
Rings are made up of millions of particles of
dust, ice and rocks
The particles can range in size from a speck of
dust to a boulder several meters wide
It is the largest planet
in the solar system
 The Great Red Spot is a
giant storm that is
larger than Pluto
 One of its moon’s,
Io, has more
active volcanoes than
anywhere in the solar
Is a band of rocks that
lies between the outer
planets (the gas giants)
and inner planets (the
terrestrial planets)
 Jupiter’s gravity keep
these rocks from
forming a planet
has seasons and polar ice caps
we have sent many unmanned rovers to
explore its surface
there is evidence that there was once liquid
water there
gets its red color from iron
oxide (rust)
surface temperatures
allow H2O to exist as a
solid, liquid and gas
 its atmosphere blocks
ultraviolet light from
reaching the
 surface
 only planet in the solar
system with life
is surrounded by thick
 the clouds create an
extreme greenhouse
effect making
temperatures hot
enough to bake a clay
pot (470 ºC)
planet closest to the sun
surface is marked with craters from meteor