Also known as: df.
DF has various meanings in the Star category. Discover the full forms, definitions, and usage contexts of DF in Star.
Dark flow is an astrophysical term describing a possible non-random component of the peculiar velocity of galaxy clusters. The actual measured velocity is the sum of the velocity predicted by Hubble's Law plus a possible small and unexplained (or dark) velocity flowing in a common direction. In 2013, data from the Planck spacecraft showed no evidence of "dark flow".
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