A thought about the Galaxy and Universe

If the total mass of a galaxy is M
and the whole galaxy moving in space at speed V (I mean the linear speed not the rotation speed)
than the linear momentum of this galaxy is M*V (M multiply V)

but the M is not constant, it is gradually reducing because M is being converted to energy is all the star (there are 100 billion star in the Milky Way galaxy)

so my thought is, if M is reducing over time and the linear momentum must be constant,
than V will be increase over time.

just wondering any scientist thought of this?

(note: i am not scientist, i study Physics in University but after that never touch Physics again)

M will never change. In no reaction is mass lost or gained. It may be converted to other energy forms which still have mass. I think you are attempting to figure out the potential kinetic energy of the galaxy with that formula
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That's right energy and mass are the same as far as equivalency is concerned.

Take and example
The Sun, about 4 million tonnes of mass are converted to energy every second in the Sun.
Once this energy leave the Sun (radiation out), only small part of this energy is absorbed by planets and the surrounding dust/astroid, most of this energy take thousand, million even billion years to reach the target.
While this energy travelling in space, this energy does not has mass (I guess).

If you consider the whole galaxy, there must be huge amount of mass converted to energy every second and huge amount of energy take million or even billion years before reach the target. So, at any moment there are huge amount of energy still in the 'journey' (the process of travelling from source to target)
and the amount of this energy is increasing over time.
So...that's why my thought is - the mass of the galaxy M is gradually reducing over time.

My question is: Does photon has mass? Than what is the mass of a photon?

Energy can neither be created nor destroyed. The photon has no rest mass but it does have equivalent mass. Try E=mc^2 and e=h(wavelength) where h is Planck's constant . Solve for m and you will see.

My point is, due to the vastness of space,
most of the energy produced by star in is going into the state of 'journey'. (the process of traveling from source to destination)
And more and more of the energy produced by star are going into the state of 'journey'.

and when energy is in the state of journey, the energy does not has physical mass despite the equation E=MC^2

Once the energy reach the destination (planets, star dust, asteroid...etc)
the destination absorb the energy than only the equation E=MC^2 come into place to calculate the increase of the mass of the destination.

And there is a long delay in time (million, even billion of years) from the point of decrease of Mass of Star when it emit energy to the point of increase of mass of the destinations when the destination absorb the energy.

photon does not has physical body nor physical mass because it is simply a theoretical concept in Physics to describe packet of energy traveling in space (packet of energy in the state of 'journey')

Gravity would pull it in. Centrifugal force would push it out. I think the universe is spinning ; about what axis i have no idea.

It is the fact that about 4 million tonnes of matter (mass) are converted to energy every second in the Sun.
That means our Sun is decreasing in mass (of matter) at rate of 4 million tonnes per second.

A Galaxy (example Milky Way) have about 100 billions star, So there must be huge amount of mass (matter) converted to energy every second.
That means the galaxy is decreasing in mass (of matter).

So if you consider only the matter part of mass M.
Momentum of a galaxy is M*V where V is the linear velocity of the galaxy.

If M decrease than V must increase because momentum of any moving body in space is constant.

Maybe this explain why the speed of galaxy is accelerating?

photon is not matter, photon has 0 diameter.
while Diameter of an electron d = 5.635880578916 x 10^-15 m
and diameter of an proton is about 2 x 10^-14.

light can be bent by gravity not because light has weight but it is because massive object causing curvature of space.

Think of a rapidly rotating carnival ride. They used to have the kind that was like a big cereal bowl. You were pushed up against the sides with considerable force. If you were fixed in the center of the "bowl" you would observe objects moving in a curved line towards the boundary wall if they were in a free situation (not in a track). A thrown ball would appear to you as having a wicked curve. The speed would increase due to acceleration if the object were tethered or restrained (Gravity).

This coriolis effect would allow us to estimate the rotational speed. I used to factor in this effect in writing computer programs to aim artillery shells. Even a one minute flight time would require significant correction depending on where you were on the Earth.

So is this an explanation. Is the Universe spinning causing the galaxies to fly apart. Where is the center ?? Where is the axis of rotation. Would the acceleration increase with distance from the center? Is there a slight curvature to the line of acceleration? You tell me; i've done my part. Sort of like a latter-day Fritz Zwicky--or do you prefer Dark Matter or revisions to Newton and Einstein.

So: I suggest a new model that allows for rotation of the entire universe. This would also explain the Milky Way-like structure of pinwheel galaxies. Drop some powdered cream into a cup of black coffee that you are stirring with a swizzle stick and you will see what I mean.

Hmmmmmmm

Galaxys as independent clusters of stars, do indeed spin in spirals, but what is the ratio of clockwise to anti-clockwise as seen from earth? And why do they spin in the first place?

That does not pre-suppose however that the universe, or the observable amount of it that we can see, is also spinning around, causing this effect.

If you look at a time lapse film of an explosion, you will see various bits spinning in the expanding field of debris. In a vacuum they will keep going.

Perhaps the insight into spin can be equated to that of what occurs within the atom. The atom has it's electron/s spinning around it's nucleus without all these electrons the atom can no longer exists, unless of course it can grab some from somewhere else. Since the atom requires spin of some form to exist so perhaps does matter too. We can then go further up the chain and state that perhaps to exist in a fairly stable state that the universe itself requires spin in some form or other.

Well, even governments need spin to survive!

The atom is a basic unit of matter that consists of a dense, central nucleus surrounded by a cloud of negatively charged electrons. The atomic nucleus contains a mix of positively charged protons and electrically neutral neutrons (except in the case of hydrogen-1, which is the only stable nuclide with no neutrons). The electrons of an atom are bound to the nucleus by the electromagnetic force.

So where does this electromagnetic force come from???

Also, since galaxies seem to be racing away from us in all directions, a rotating universe theory would have to place us at the exact center, back to a pre-Galileo, earth-centered cosmology. The odds of us just happening to be at the exact center of the universe are remote.