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andreasbeer1981 t1_iu9upff wrote

Reply to comment by exscape in Is dark matter orbiting galaxies with the same speed as normal matter? by taracus

"Dark matter is called "dark" because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect, or emit electromagnetic radiation and is, therefore, difficult to detect."

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exscape t1_iu9vyka wrote

> 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.

Also:
https://en.wikipedia.org/wiki/Russell%27s_teapot

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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.

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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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