dark matter is not a theory

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Strong rec badosu · 2023-12 · on “Astronomers posit that we live in a giant void”

This is a dense video, I highly recommend it though: [this video] TLDW: there's a lot of evidence on why the phenomena we watch is mostly favored to be described as 'something' that is conveniently called dark matter as opposed to a revision of gravity.

Recommends Pxtl · 2023-10 · on “Revisited mass of the Milky Way is much smaller than expectations from cosmology”

There's a good cosmology YouTuber who basically explains: dark matter is not a theory, it's a set of observations. Galaxies behave like there's a halo of invisible mass surrounding them, one that varies in density per-galaxy. The halos even perturb as expected in galaxy collisions. But nobody's got a coherent theory on what that halo is. [this video]

Recommends aeturnum · 2023-10 · on “Revisited mass of the Milky Way is much smaller than expectations from cosmology”

If you're interested in learning more I recommend you watch "dark matter is not a theory"[1]. We consistently, across many measures, observe the effect of substantially more mass than we expect using traditional understandings of dynamics. People have been aware of it, under different names, for about 90 years now. [1] [this video]

Recommends PartiallyTyped · 2024-06 · on “Gravity Without Mass: UAH Study Proposes Alternative to Dark Matter”

IANAP (physicist) The only the matter portion of the universe is 85% dark matter (26.8% of mass-energy content of the universe). As for the question; I don't think it's right to assume that dark matter really is exotic matter. It's just a set of observations. It's something that behaves like matter (with respect to density scaling) but only seems to interact gravitationally. Some theories posit that it's some unknown particles, others that they are primordial black holes, and some that gravity just behaves differently (MOND). I really enjoyed Dr Angela's videos on Dark Matter [1,2] [1] [LINK] [2] [this video]

Recommends bunderbunder · 2024-08 · on “The possibilities for dark matter have shrunk”

If you've got the time, these YouTube videos are a nice counterpoint to a lot of popular communication and discussion on dark matter: Dark matter is not a theory: [this video] That dark matter video aged like milk: [LINK] the tl;dr is that "dark matter" is a bit of a misnomer. (But also a fun name so it's probably here to stay through sheer memetic momentum.) Dark matter is not actually a hypothesized kind of matter. Dark matter is just an unresolved discrepancy between theory and observation. I'll say that again: "dark matter" is not an attempt at explaining the discrepancy; dark matter is the discrepancy. There are some hypotheses that postulate some kind of as-yet-unobserved matter that could

Cites johnnyworker · 2023-07 · on “An Invitation to a Secret Society”

Doing something professionally just means doing it for money and with the authorization of others, not necessarily doing it well. We all know about professional software developers who are forced by their profession, that is, the fact that they do it under contract X for company Y managed by person Z, to do things that they know are complete crap. I mean, SAP is professional. Microsoft or Google lock-in? Highly professional! Shiny even. Supporting RSS? Not professional. A gimmick you're allowed, like what you do outside of work. Or even more brutal: Ignaz Semmelweis. That he was a professional didn't help him, the super mega cereal professionals undid his efforts without blinking, and withou

Cites SJC_Hacker · 2024-04 · on “Scientists say they have found evidence of an unknown planet in our solar system”

Angela Collier (astronomy post-doc) takes the position that dark matter isn't an theory, but an observation [this video]

Cites karmakaze · 2024-06 · on “Wild new study suggests gravity can exist without mass”

"Dark matter is not a theory"[0] Dark matter, do we need it? what is it? where is it? how much? Full rap mp3[1] [0] [this video] [1] [LINK]