What is dark matter?
Dark matter is the term astronomers use for the matter that they detect in the universe which cannot be seen. What I mean by this is that although when you look through a telescope nothing appears to be there, the way that the visible matter moves indicates that there must be more mass present. It is currently thought that about 10% of the matter in the universe is visible, the rest is something we don't understand.
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- Why doesn't dark matter fall into a black hole?
- Could photons be dark matter?
- How far does a galaxy extend?
- What makes up most of the Universe?
- Could a different theory of gravity explain the dark matter mystery?
- Are there any dark stars or dark galaxies made of dark matter?
- What's the difference between dark matter and dark energy?
- How can we compare dark matter and dark energy?
- What is Hot Dark Matter theory?
- Could neutrinos be dark matter?
- Could the Universe's dark matter be made up of black holes?
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