
This book was created and published on StoryJumper™
©2014 StoryJumper, Inc. All rights reserved.
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The Big Bang
The universe formed from a point of infinitely
small volume which had high density and
temperature. This point then exploded, and
the universe grew from smaller than a single
atom to the universe in a fraction of a second
and is still expanding today.


Sun
Waves of energy traveling through space
pushed clouds of hydrogen and helium closer
together and gravity caused them to collapse
in on themselves. As the matter came
together, gravity caused it to spin and flatten
into a disc. In the center, the material clumped
together to form a protostar. As the
temperature and pressure increased the fusion
of hydrogen began, which fuels the sun today.


Mercury
Mercury is the closest planet to the sun, at 46
million kilometers. Its surface temperature
varies greatly, as it is a cold 100 Kelvin during
the night and a hot 700 Kelvin during the day.
It also has a large metal-to-silicate ratio. There
are multiple theories on how Mercury was
formed, however, the most accepted is the
giant impact hypothesis. It is believed that
Mercury is smaller than it originally was due to
an object ⅙ its size hitting in and stripping
away its crust and mantle.


Venus
Venus is known as Earth’s sister planet due to
their similar size and mass. It has a very thick
atmosphere composed of carbon dioxide and
nitrogen. Sulfuric acid covers the planet as a
layer of clouds. Scientists believe two huge,
protoplanetary bodies collided head on and
merged to form Venus.


Earth
Earth formed around 4.54 billion years ago by
the birth of the solar nebula. Volcanic activity
probably created the atmosphere, but it
contained almost no oxygen and would have
been toxic to humans and most modern life.
Much of the Earth was molten because of
extreme volcanism and frequent collisions with
other bodies. One very large collision is
thought to have been responsible for tilting the
Earth at an angle and forming the Moon. Over
time, the planet cooled and formed a solid
crust, allowing liquid water to exist on the
surface. Earth’s atmosphere is about 300 miles
thick, consisting mainly of nitrogen, oxygen,
argon, and carbon dioxide.


Mars
Mars formed from the energy of multiple
collisions. denser elements, such as iron,
formed the core, while lighter silicates formed
the mantle. Young mars had active volcanoes
which spewed water and carbon dioxide into
the atmosphere. However, these volcanoes are
no longer active, and mars began to cool.


The Main Asteroid Belt
Dust and rock circling the sun was pulled
together by gravity into planets. But Jupiter
kept a number of the pieces from forming into
another planet. Instead, its gravity disrupted
the formation process, leaving an array of
unattached asteroids.
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This book was created and published on StoryJumper™
©2014 StoryJumper, Inc. All rights reserved.
Publish your own children's book:
www.storyjumper.com



The Big Bang
The universe formed from a point of infinitely
small volume which had high density and
temperature. This point then exploded, and
the universe grew from smaller than a single
atom to the universe in a fraction of a second
and is still expanding today.

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