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Bakkster t1_iwx941i wrote

Reply to comment by Dante2005 in Dark Matter as an Intergalactic Heat Source. Spectra from quasars suggest that intergalactic gas may have been heated by a form of dark matter called dark photons. by MistWeaver80

>"Dark" was always the word for "unknown" or "unproven" so you are not wrong entirely.

I thought it was more specifically dark as in didn't absorb reflect or emit light or other reflective radiation, unlike cosmic dust and stars. We just see the gravitational lensing as if it were a dense cloud of dust, but no dust.

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Dante2005 t1_iwx9qbj wrote

I hear you, but dark in that form that you mentioned was about black holes, and in this you were 100% correct.

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williemctell t1_ix083bh wrote

No, u/Bakkster is absolutely correct and this has ~nothing to do with black holes. Dark matter is “dark” because it doesn’t interact electromagnetically.

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