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Here's an unrelated question. Do we think essentially all stars are contained within galaxies? Or could there be there free-floating stars in the universe tha
by floxy 6y ago
Here's an unrelated question. Do we think essentially all stars are contained within galaxies? Or could there be there free-floating stars in the universe that aren't confined to galaxies?
- sanity31415 6y agoGalaxies aren't always cohesive, they can collide, split apart, etc - so the answer is "no".
- renke1 6y agoSee https://en.wikipedia.org/wiki/Rogue_star https://en.wikipedia.org/wiki/Rogue_star Also interesting: "The hypothesis that stars exist only in galaxies was disproven in 1997 with the discovery of intergalactic stars."
- gizmo686 6y agohttps://en.wikipedia.org/wiki/Intergalactic_star https://en.wikipedia.org/wiki/Intergalactic_star Such stars have been observed to exist. The common thought is that they formed within galaxies but ejected from them through gravitational forces.
- floxy 6y agoAwesome. That's a great article: "...several other anisotropies at other wavelengths – including blue and x-ray – have been detected with other space telescopes and they are now collectively described as the diffuse extragalactic background radiation. Several explanations have been discussed by scientists, but in 2012, it was suggested and shown how for the first time this diffuse radiation might originate from intergalactic stars. If that is the case, they might collectively comprise as much mass as that found in the galaxies. A population of such magnitude was at one point thought to explain the photon underproduction crisis, and may explain a significant part of the dark matter problem."
- jacquesm 6y agoSolar system sized intergalactic spacecraft.