why is there gravity?

why is there gravity?

It keeps us on earth, keeps elements in place, heck it imprisones everything. Why does it exist, and if its caused by mass, why isn't there gravity in space, since its huge.

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Soulfure
The reason why there is gravity on Earth, is because of its mass. Mass is the space that it takes up. Due to the size of the Earth, there is a downward force of 1 G. Gs are measured in Earth's gravity. Also, the reason why there is little gravity on the moon is because it is smaller than the Earth.
on March 17
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Horse.of.Wagon
Well because, if we didn't have gravity we wouldn't have air and if we didn't air we wouldn't breathe and we don't breathe we die and we die we never exist :3
on August 28, 2014
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Nightcat
If there was no gravity, you would drift off into with no way of moving. Also, your muscles would waste away and all the problems astronauts get in space would happen. The Earth has gravity because it's a planet, so it's big enough to have its own gravity field.
Nightcat
There is gravity in space, but it is weaker than on earth
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on July 27, 2014
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on July 27, 2014
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Elleyd
http://en.wikipedia.org/wiki/Gravity

If you have more questions, please feel free to ask.
on July 26, 2014
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