Re:Astronomers discover a strange galaxy without dark matter
by uoaei on Wednesday January 12, 2022 @07:24PM
(#29914996)
Does the angular momentum of a galaxy contribute to its energy density (mass)?
What kinds of relativistic effects have been postulated for explaining our observations?
Something about dark matter which always struck me was that I have not seen explanations which incorporate the very limited perspective we have on galaxies -- being singular beings on a tiny rock very far away -- and how the light follows geodesics which may be significantly different from straight lines in the non-relativistic view. If these galaxies are large enough to lens light from elsewhere, doesn't it follow that this should be happening in places of high mass/energy density like the interior of galaxies, too? In other words, are the edges of the galaxies really where we think they are?
Is there any "whirlpool" effect that gravitational waves may have that would sweep or twist these geodesics as the galaxy rotates?
What kinds of relativistic effects have been postulated for explaining our observations?
Something about dark matter which always struck me was that I have not seen explanations which incorporate the very limited perspective we have on galaxies -- being singular beings on a tiny rock very far away -- and how the light follows geodesics which may be significantly different from straight lines in the non-relativistic view. If these galaxies are large enough to lens light from elsewhere, doesn't it follow that this should be happening in places of high mass/energy density like the interior of galaxies, too? In other words, are the edges of the galaxies really where we think they are?
Is there any "whirlpool" effect that gravitational waves may have that would sweep or twist these geodesics as the galaxy rotates?