this post was submitted on 15 Oct 2024
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science

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[–] acosmichippo 13 points 2 weeks ago* (last edited 2 weeks ago)

I think you're conflating dark matter and dark energy, they are two different things. Dark Energy is what's accelerating universal expansion. Dark Matter slows it down.

and I would actually classify them as "known unknowns" since they are holes in our understanding of physics that we're aware of. A true unknown unknown wouldn't be in scientific discussion at all or have even been given a name; it would be completely off our radar.