Submitted by taracus t3_ygfptx in askscience
exscape t1_iu9vyka wrote
Reply to comment by andreasbeer1981 in Is dark matter orbiting galaxies with the same speed as normal matter? by taracus
> does not appear
That matches what I said.
And regardless, EM and gravity aren't the only forces in existence. There's no proof it ONLY interacts gravitationally as you said.
andreasbeer1981 t1_iuadk1d wrote
well, there is no proof that dark matter even exists. this is why it makes sense to make all kinds of experiments to find out more.
CrashCalamity t1_iuc7p4y wrote
Consider: Dark matter is something of a "placeholder name" as it pertains to a theory to explain certain anomalous (yet repeatably measureable) results in astrophysics. Something is causing it, but we need to figure out what and how.
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