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HU742
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What is dark matter and dark energy, and how do we know they exist?
I have just completed my first physics class. I was wondering what dark matter and dark energy is? Also, if we can not see it how do we know that it is there? All answers would be appreciated.
HU742
Thread
Aug 23, 2013
Dark energy
Energy
Physics
Replies: 7
Forum:
Astronomy and Astrophysics
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