Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: Dave Lev on 17/06/2018 20:39:29

Title: Could it be that gravity by itself can explain the stracture of spiral galaxy?
Post by: Dave Lev on 17/06/2018 20:39:29
Could it be that gravity by itself can explain the stracture of spiral galaxy?

Please read and advise.

Could it be that our scientists have missed the main structure of spiral galaxy?
They only see spiral arms.But this is just one element in the galaxy.
Why they can't see that there are bridges and branches between the arms?
So, the spiral galaxy is a complex of structure with few spiral arms but with many bridges and branches.
Could it be that gravity force leads the whole activity in the galaxy?
We all know that Gravity works locally, while locally is relativity!!!
Therefore, as the moon orbits around the Earth/moon center of mass, the Sun orbits around the local arm center of mass.
As the Earth/moon center of mass orbits around the Sun, the Sun' local center of mass orbits around the center of the galaxy.
So, could it be that the Sun doesn't orbit around the galaxy but it orbits around a local center of mass?
Please look at the following:
http://www.biocab.org/Motions_of_the_Solar_System.jpg
Do you agree that it shows that the Sun orbits around a local center of mass in the Spiral arm?
We see clearly that as it orbits this center, it moves in and out to the galactic center and also up and down to the disc.
Could it be that the only explanation for that is a simple orbital cycle?
I really wonder how could it be that our scientists have failed to see this key element?
However, this is just part of the story.
Let's assume that our Sun also drifts outwards from the Center.
Therefore, its real velocity is not identical to the spiral arm velocity.
Actually, if we could force the arm to stay at one location, we should see that as the Sun drifts outwards, it can still have a significant velocity. We should also see that the Sun sets a nice orbital cycle around its local center of mass.
Hence, could it be that although the spiral arm orbits at lower velocity around the center of the galaxy, the Sun can gain higher velocity and still stay in the spiral arm which is based on gravity dense?
We can think about it as some sort of gravity highway:
http://astronomy.swin.edu.au/cosmos/...ity+Wave+Model
However, the cars must stay at the gravity roads. From time to time they can move to other highway by using bridges and branches, but in general they have to stay at the road at any given moment.
Therefore, could it be that the SMBH has no real effect on the velocity of a star which is located far away in one of those roads and there is no real need for dark matter to keep the Sun in its orbital cycle?
Hence, the stars can orbit at fairly constant speed (depending on their location in the gravity road) without any issue for winding problem.
Do you agree with that?
Title: Re: Could it be that gravity by itself can explain the stracture of spiral galaxy?
Post by: chris on 18/06/2018 17:40:19
Gravity, angular momentum, kinetic (thermal) energy, and dark matter: https://www.thenakedscientists.com/articles/questions/dark-matter-really-there-and-how-do-we-know
Title: Re: Could it be that gravity by itself can explain the stracture of spiral galaxy?
Post by: Dave Lev on 19/06/2018 05:09:35
Gravity, angular momentum, kinetic (thermal) energy, and dark matter: https://www.thenakedscientists.com/articles/questions/dark-matter-really-there-and-how-do-we-know

Thanks

With regards to: "Is dark matter really there and how do we know?"

Let me ask why dark matter must be finite?
If we increase the orbital radius, we also increase the sphere for the dark matter.
So, technically, we can add more and more dark matter into the orbital sphere.
However, as the dark matter is significantly higher than the normal matter, we could find that at long enough radius, the impact of small galaxy might be similar to bigger galaxy.
How can we explain that?