Major Updates About Bizarre Galaxies Without Dark Matter
https://iopscience.iop.org/article/10.3847/1538-4357/adae11/pdf
https://arxiv.org/pdf/2408.12663
https://arxiv.org/pdf/2603.15860
https://www.aanda.org/articles/aa/pdf/2025/03/aa53522-24.pdf
Comments (5)
The reason is, that if the effects of dark matter can be explained alternatively by a modified law of gravity which attenuates at great distances, then dark matter does not exist.
The absence of dark matter proves that dark matter exists.
MOND -1
This sounds like a fallacy: "Because the galaxy has no dark matter, it's a proof that dark matter is real." It is like saying, because there is no 'Coriolis force' at the centre of a rotating object, it proves that 'Coriolis force' is real. But we know that the Coriolis force is a fictitious force.
Apologies if I am unclear: English is not my mother tongue. I understand where you’re coming from. I reconcile it by considering two parts that act as support of dark matter by these: 1) These galaxies lack the effects that other galaxies exhibit (a gravitational force from unseen —i.e.: dark — matter was holding them together). 2) Observing their stars and dust shows them to be moving at much slower speeds compared to other galaxies. Hence there is no dark matter source of gravity because their motion can be explained by the gravity caused only by the visible matter.