0 Members and 1 Guest are viewing this topic.
Due to the total mass of the ring it would continue to be stable.
Imagine that stars aren't fully equally spaced round the ring.
QuoteQuote from: Dave Lev on Today at 04:53:22Due to the total mass of the ring it would continue to be stable.No.Because it was stable, and you changed it, so it is not stable anymore.
Quote from: Dave Lev on Today at 04:53:22Due to the total mass of the ring it would continue to be stable.
OK imagine there's a ring of 12 stars- all the same mass, and they start off equally spaced round the ring going clockwise. We can label them like the numbers on a clock.
1. Imagine there's a ring of 12,000 stars (instead of just 12) - all the same mass, and they start off equally spaced round the ring going clockwise. We can label them like the numbers on a clock.
I didn't change he stability of the ring.
So, why a ring with 12,000 can't be more stable than 12?
However, as we get to the point of the arm that could pop up from the ring,
you suddenly close the discussion by claiming that the ring is not stable anymore..
Because it was stable, and you changed it, so it is not stable anymore.
We all know that based on the density wave each star is affected by the gravity force from a central Dark matter.
As I pointed out, the ring isn't stable once you move one of the stars, and that's what you did.
ring of 12 stars- all the same mass, and they start off equally spaced round the ring going clockwise.
The simple answer is you get chaos.Eventually the stars crash into each other and you end up with a disk shaped splodge.
There is no central dark matter AFAIK, unless you mean something different than what you wrote.
I just want to verify how any ring of stars (while each star is connected to the other nearby stars by local gravity) could work.
So, the whole idea is that a line of stars that we call arm can pop out from the ring as it spine.
what kind of force keeps the Sun in its orbital motion around the galaxy?
QuoteQuote from: Dave Lev on Yesterday at 19:35:49So, the whole idea is that a line of stars that we call arm can pop out from the ring as it spine.No.You just made that up. There's no reason for anyone to believe it, is there?
Quote from: Dave Lev on Yesterday at 19:35:49So, the whole idea is that a line of stars that we call arm can pop out from the ring as it spine.
Please look again at that ring Galaxy:https://en.wikipedia.org/wiki/Ring_galaxy#/media/File:Hoag's_object.jpgDon't you see that the ring is actually located at the inner side of that galaxy while from the inner side there is almost unlimited no. of spiral arms that goes up to the outer side of that ring.That shape isn't due to the density wave.It is all about lines of stars (that are connected by local gravity force with each other) that popped up from the inner ring and set tinny spiral arms.
Quote from: Dave Lev on 23/12/2021 19:35:49what kind of force keeps the Sun in its orbital motion around the galaxy?Why not ordinary gravity attracting ordinary mass?Or a large diffuse loud of dark matter?
You still need to explain what magic might make a star suddenly "jump" out of the ring.
If you would except that real idea that "Stars are connected to each other by local gravity force" you would understand how the entire milky way really works.
Quote from: Dave Lev on 24/12/2021 04:31:27If you would except that real idea that "Stars are connected to each other by local gravity force" you would understand how the entire milky way really works.I'm not accepting any breakages of the laws of physics.
Quote from: Bored chemist on 24/12/2021 13:21:01Quote from: Dave Lev on 24/12/2021 04:31:27If you would except that real idea that "Stars are connected to each other by local gravity force" you would understand how the entire milky way really works.I'm not accepting any breakages of the laws of physics.Stars are attacked to each other by gravity force.This is the basic law of physics.You have already confirmed it.You may ask Newton about it.Hence, when you reject this basic law, you are the one that actually breaks the law of physics.Why do you refuse to confirm that we clearly observe almost unlimited spiral arms as they pop outwards from the internal ring?Why is it so difficult for you to accept the observation as is?
You forgot that you started with real physics and then you added the word "local" to make it wrong.I don't know why you thought it was helpful to break it.
Gravity is not local, it has an infinite range.
If gravity is not local, then can you please explain why the Moon orbits around the earth and not around the Sun?
No.They orbit their combined centres of mass.The path of the Moon is roughly a circle with 13 sided lumps on it, round the Sun.
please explain why the Moon orbits around the earth and not around the Sun?
Quote from: Dave Lev on 24/12/2021 17:01:47please explain why the Moon orbits around the earth and not around the Sun?Because F = GmM/r2, as proved by Henry Cavendish (Peterhouse, class of 1748) in 1798.Whilst Msun >> Mearth, rsun-moon >>rearth-moon and 1/r2 means the earth wins.
The Moon does orbit round the Sun.
They orbit their combined centers of mass.
If the Earth was invisible, a distant observer would see the Moon orbiting the Sun in a wobbly orbit.
https://en.wikipedia.org/wiki/Ring_galaxy#/media/File:Hoag's_object.jpgI have just used it as an example for ring structure.However, as I have introduced the idea of spiral arms that should pop up from the ring, I have asked my self - If that idea is correct, then why we do not observe those lines of stars or arms that should pop out?So, I look again carefully on he image and found them all.That proves that when your theory is correct - You MUST observe that it is correct.
As the Moon would move wherever the earth moves, the Sun would move wherever that "combined centers of mass" in the arm moves!