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Originally posted by leejones
what if its another dimension ?
Hydrogen gas releases radiation that can be detected at radio wavelengths.
In the Virgo cluster of galaxies, they found a mass of hydrogen atoms a hundred million times the mass of the Sun
If a light year is the distance light can travel through space within a 365 day cycle, would that sort of measurement even mean anything in a dark matter galaxy?
If dark matter does not react with light, would it be governed by our ideas of space and time? Would its laws of physics be completely different?