0 Members and 1 Guest are viewing this topic.
as the first level of gravity motion.
This is the meaning of real science.
So, how those stars could be ejected from the galaxy at so high velocity?
On average, the stars will "fall" in, but some will get flung out and there will be collisions- it will be a mess.
If the individual stars have a net angular momentum then the blob that t they coalesce into will also have that that momentum ( give or take any carried off by stars flung out during the process).
"Stars are connected to each other by gravity force"
They orbit their combined centers of mass.
Conclusion:Any orbital object in the entire Universe orbits in its first level of orbital motion around some "combined centers of mass".
The mass of the Sun is 2 *10^30KgThe mass of the Earth is 6 *10^24KgA ratio of about 333000 to oneAll things being equal, the Sun's gravity is 333000 times stronger.
But the Sun is further away.
The radius of the Earth's orbit is 1.5*10^8 KmThe radius of the Earth's orbit is 1.7 x 10^3 Km
And the strength of gravity is proportional to the reciprocal of the distance squared.So the Earth's attraction to the moon would 8 billion times bigger.So the overall effect is that the Sun's attraction for the Moon is about 23000 times less than that of the Earth..
The mass of the Sun is 2 *10^30KgThe mass of the Earth is 6 *10^24KgA ratio of about 333000 to oneAll things being equal, the Sun's gravity is 333000 times stronger.But the Sun is further away.The radius of the Earth's orbit is 1.5*10^8 KmThe radius of the Earth's orbit is 1.7 x 10^3 KmA ratio of 88000 to 1And the strength of gravity is proportional to the reciprocal of the distance squared.So the Earth's attraction to the moon would 8 billion times biggerSo the overall effect is that the Sun's attraction for the Moon is about 23000 times less than that of the Earth.
so the sun exerts about twices the force on the moon than does the Earth.
But the Moon is still in orbit round the Sun.There is only 1.If you drop a mass it falls down.That's gravity. It has only one direction.
On average, the stars will "fall" in, but some will get flung out and there will be collisions- it will be a mess.If the individual stars have a net angular momentum then the blob that t they coalesce into will also have that that momentum ( give or take any carried off by stars flung out during the process).
I'll agree that under Newtonian gravity, stars exert a force on each other via gravity. All stars, not just the nearby ones
Any simplification of this (like some distant system of two stars acting approximately as a combined mass) needs to be derived, and you've not done that, so your assertions are baseless and eventually very wrong.
The Earth does not orbit the moon since it's velocity relative to the moon is greater than the moon's escape velocity.
A center of mass is just an abstract point in space and has no attractive ability.
I have already PROVED my statement by the Sun-Earth-Moon system.
Even so and, under Newtonian gravity the Moon orbits around the Earth and not directly around the Sun.
So, why do you claim that it has no attractive ability?
Quote from: Dave Lev on 25/12/2021 19:22:38Even so and, under Newtonian gravity the Moon orbits around the Earth and not directly around the Sun.The Moon goes round the Sun.You keep trying to ignore this.Why?
That CoM is actually a virtual point in space that represents to the whole Universe that they are "connected" by gravity.
From outside gravity point of view
there is no individual object as Earth or Moon.
The Sun will keep on holding by gravity that CoM wherever it is located in space.
If you don't understand that simple explanation - then you can't understand how gravity really works in the galaxy.
1.7 x 10^3 Km
QuoteQuote from: Dave Lev on Today at 05:48:45That CoM is actually a virtual point in space that represents to the whole Universe that they are "connected" by gravity.No.Because, as we keep pointing out, and you refuse to learn, everything is connected by gravity.That CoM is just a fiction that humans use to do approximate calculations.
Quote from: Dave Lev on Today at 05:48:45That CoM is actually a virtual point in space that represents to the whole Universe that they are "connected" by gravity.
We actually should call it - "Barycenter"
If you still don't understand it - then we have a real problem.
I would like to get Halc' advice/help on this issue.
Quote from: Dave Lev on 25/12/2021 05:54:41Conclusion:Any orbital object in the entire Universe orbits in its first level of orbital motion around some "combined centers of mass".Dave, You are to desist on this line of reasoning since it was taken apart in prior threads when you called it "LCM".
Quote from: Dave Lev on 04/12/2021 04:52:47I have no intention to offer any solution for our Universe.The bobbling motion of the sun proves that it orbits locally around a center of mass while that center of mass orbits around the galaxy.This sounds like you’re trying to sneak in that LCM nonsense. Desist immediately with this or the thread locks.
I have no intention to offer any solution for our Universe.The bobbling motion of the sun proves that it orbits locally around a center of mass while that center of mass orbits around the galaxy.