Another galaxy without dark matter

  • 17 Replies
  • 2564 Views

0 Members and 1 Guest are viewing this topic.

TLEILAXU

  • *
  • Old Name
  • *****
  • Exalt-Smiter of Theories
  • Posts: 731
    • View Profile
« Reply #15 on: April 18, 2019, 09:38:56 pm »
Recall, Newtonian equations seemed to explain gravitation, until we realized they didn't really, only from one inertial perspective.  So, something akin to that might be the case here.  We figure that the "seemingly missing" force must be from "something" and so infer that this something is Dark Matter/Energy.  It could be the case that we simply are not "using the right perspective" or that our method of calculation is just missing something.

Yeah, when I first learned a bit about this dark stuff and then heard about a galaxy with none of it - I was like, well that galaxy looks just fine ( could be it's not ), so this dark stuff ain't necessary - or it could be like you say, since we think something is there we know nothing about, could be it's not there and we're not understanding something that can explain our results/readings.
Actually, it's the opposite. The fact that you can find galaxies that behave as if there's no dark matter strengthens the conclusion that there IS something dark and heavy and at the same time demolishes alternate theories (for how would these galaxies without dark matter behave as they do in that case?).

TaoHorror

  • *
  • Old Name
  • *****
  • Posts: 1152
  • Blueberry PsĂ»khe Sorcerer
    • View Profile
« Reply #16 on: April 18, 2019, 11:15:48 pm »
Recall, Newtonian equations seemed to explain gravitation, until we realized they didn't really, only from one inertial perspective.  So, something akin to that might be the case here.  We figure that the "seemingly missing" force must be from "something" and so infer that this something is Dark Matter/Energy.  It could be the case that we simply are not "using the right perspective" or that our method of calculation is just missing something.

Yeah, when I first learned a bit about this dark stuff and then heard about a galaxy with none of it - I was like, well that galaxy looks just fine ( could be it's not ), so this dark stuff ain't necessary - or it could be like you say, since we think something is there we know nothing about, could be it's not there and we're not understanding something that can explain our results/readings.
Actually, it's the opposite. The fact that you can find galaxies that behave as if there's no dark matter strengthens the conclusion that there IS something dark and heavy and at the same time demolishes alternate theories (for how would these galaxies without dark matter behave as they do in that case?).

Forgive me, I'm out of my depth here - you're right, it's their spin that's off that alerts us to a lack of dark matter, not something measured.
It's me, Dave, open up, I've got the stuff

H

  • *
  • The Zero-Mod
  • Old Name
  • *****
  • The Honourable H
  • Posts: 2889
  • The Original No-God Apologist
    • View Profile
    • The Original No-God Apologist
« Reply #17 on: April 25, 2019, 05:51:53 pm »
No Dark Matter = Proof of Dark Matter?

Good video, like most of the PBS Space Time ones.
I am a warrior of ages, Anasurimbor. . . ages. I have dipped my nimil in a thousand hearts. I have ridden both against and for the No-God in the great wars that authored this wilderness. I have scaled the ramparts of great Golgotterath, watched the hearts of High Kings break for fury. -Cet'ingira