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Originally posted by rickymouse
That is all right, those who want to believe in Dark Matter can if they want to, I believe in god even though there is no real evidence he exists. What they are calling Dark Matter is just an unexplainable Phenomenon. Like background noise.
Originally posted by swan001
"Science" means "knowledge" (sciencia). If you "believe" in Dark Matter, it's not "knowledge", thus it is not "science". Only assumption.
Originally posted by thov420
Please excuse any errant thoughts in this post as I'm no physicist or expert on the matter whatsoever but I just had a couple of thoughts. Ok gravity is what holds moons around their planets and planets around their suns and presumably the stars around their galactic centers. Science assumes all galaxies have a super massive black hole at their centers.
Therefore our star, the Sun, is currently being sucked into a giant water drain, Sagittarius A* for the astrophysicists out there, and therefore it seems like every star and galaxy is moving away from us.
Again I haven't the slightest clue on all the math 'n such that goes into the calculations required to understand the universe but looking at it from my perspective it seems like a lot of work to explain objects spiraling down a drain. I know there are way more knowledgeable people on ATS than me and yet it seems so simple at the same time. Maybe I'm just missing something obvious to others?
I am not sure that a single galaxy constitutes a reversal on a theory till many others could be located.
What you say regarding a singularity is true, though the singularity is very confined, it doesn't spread out for 100s of thousands of light years...
Remember, the inner bulges of galaxies actually behave how we expect them to. even the stars around the galactic centre behave correctly when applying relative corrections because of the high velocities... The whole point of the 'Dark Matter Halo' is that over a short distance such as between the galactic centre and its nearest stars, it plays little to no role... it is only when you move to larger distances.
Spirals in a galaxy are not something physical, more over the represent regions in which blue stars are forming, these stars are quite short lived so the spiral actually propagates around a galaxy faster than the stars rotate. this has been known for years.
Originally posted by -PLB-
reply to post by swan001
Hmm so basically you are saying that all our current understanding of physics must be wrong because you don't like the concept of dark matter.
Sorry, there is dark matter
Originally posted by swan001
Where did I say that?
Isn't that a bit of an over-reaction? No, If DM doesn't exist, it doesn't mean Newton's laws don't apply anymore to large bodes, neither does it mean that Borh's model for the atom is wrong. It just means DM is not there.
That is only partially true at best. These galaxies in my OP has no DM. It's possible most elliptical don't neither.The question should be, why.
First: The gravity that was just the gravity from that one galaxies without considering all the mass in the universe.
Second: There is no consideration for the electric forces. Electric force is about 10^12 times stronger than gravity. This is much more the cause of motion in the universe than gravity. This being known, both of these two forces must be taken into account when working with motion.