Imagine that you see two galaxies out in space. They are at the same distance, and have the same brightness, shape and size. In one of these galaxies, however, the stars are moving faster. Which galaxy contains more dark matter?
Imagine that you see two galaxies out in space. They are at the same distance, and have the same brightness, shape and size. In one of these galaxies, however, the stars are moving faster. Which galaxy contains more dark matter?
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Imagine that you see two galaxies out in space. They are at the same distance, and have the same brightness, shape and size. In one of these galaxies, however, the stars are moving faster. Which galaxy contains more dark matter?
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