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from the noone-knows-how-the-cloud-works dept.
A nearly invisible dwarf galaxy is challenging the model of dark matter. An international team of astronomers, led by the Instituto de Astrofísica de Canarias (IAC) in collaboration with the University of La Laguna (ULL) and other institutions, discovered this fascinating galaxy dubbed "Nube."
Nube, which means "Cloud" in Spanish, was named by the 5-year-old daughter of one of the researchers, aptly reflecting the galaxy's ghostly and diffuse appearance. Its discovery is significant because its faint surface brightness allowed it to remain undetected in previous sky surveys, despite its considerable size.
"With our present knowledge we do not understand how a galaxy with such extreme characteristics can exist," says study first author Mireia Montes, researcher at the IAC and the ULL, in a media release.
Nube is unique in its properties, being ten times fainter yet ten times more extended than other dwarf galaxies with a similar number of stars. Its discovery is akin to finding a hidden treasure in a well-explored attic. Nube is large and yet faint, a ghostly apparition in the universe. To put it into perspective, it's about one-third the size of the Milky Way but has a mass comparable to the Small Magellanic Cloud.
What sets it apart is its significant amount of dark matter, an invisible substance that does not emit, absorb, or reflect light, making it undetectable by traditional telescopes.
Related: Bizarre Galaxy Discovered With Seemingly No Stars Whatsoever
(Score: 2) by Gaaark on Thursday February 01 2024, @09:33PM (1 child)
Newton's theory of gravity was good for a long time and still holds for a lot of things... but was wrong.
GR holds for a lot of things but cannot be married with the quantum world, and therefore is wrong.
Quantum Inertia:
has DARPA funding and was satellite launched... just waiting for it to be activated to see results.
https://physicsfromtheedge.blogspot.com/ [blogspot.com]
Not married to it completely, but it's nice to see an actual formula (without modifications like MOND) that has worked again and again.
Works with the quantum world and seems to work just like GR but without all the GR problems.
--- Please remind me if I haven't been civil to you: I'm channeling MDC. I have always been here. ---Gaaark 2.0 --
(Score: 2) by Immerman on Friday February 02 2024, @03:09PM
Or QM is wrong. Both theories are extremely well tested, and both have some major mysteries hinting that they are incomplete. For QM the biggest mystery is "What is a measurement?" - nothing in the theory even hints at an explanation as to why quantum wavefunctions should ever collapse.
It could very well be that GR is correct, while our current QM theories are just an oversimplification based on the incorrect assumption that spacetime is flat. The math for QM in curved spacetime would likely be atrociously complicated - but that isn't actually an argument against it.
As for the QI, etc. stuff - you shouldn't give it too much credence just because the NASA "fringe science division" is investigating them. They're basically the debunking team, their whole shtick is testing ideas that are almost certainly garbage, but whose benefits if they somehow actually worked would be so great that it's worth making *sure* of that before throwing them away.