Dark matter ? Am i right in saying that visible matter ( i.e. galaxys ) only make up around 10% of the matter

Question

that scientists believe should of occured during the big bang.So to account for this and because they cant see it, they call it dark matter? Is that right? Thanks, Sir tuna.

Answer 1

Bubba Jane may believe it's true but I'm not convinced.

The 10% figure comes from a need to 'close' the universe gravitationally.

A closed universe will eventually stop expanding and collapse. Cosmologists assume this will trigger another big bang. There are lots of good reasons to believe this theory.

However, my problem with it is that it overlooks two key facts

1: It is contrived to give a best case scenario for the universe. All other scenarios as far as I can tell have this universe dying cold and dark and that's the end of the story. By 'closing' the universe, you can continue the cycle of life by creating another when ours is done. This is a pleasant enough theory but for one small problem....fact 2

2: There is absolutely no evidence that this 90% exists. Yes it's true, there does appear to be a small amount of matter in the universe which we cannot see. Infact, there's far more we can't see than can. This shouldn't be a major surprise. Space is big and dark. Only the brightest suns can be seen over big distances. The way the stuff we can see is influenced by the stuff we can't. This alone proves there's a lot of invisible stuff out there. But not nearly enough.

Faced with their crowning theory being annihilated bringing much cosmology tumbling down, the neutrino has been endowed with mass....despite all the evidence to the contrary. As experiments get more and more sensitive, the lower limit of the neutrinos mass, if it really has one, is getting to the point where it's below the threshold it needs to be to make the difference.

When someone more learned than I said, 'if the neutrino had a mass, i'd expect it to have the decency to have enough to be detectable', it nailed the coffin shut for me.

The cosmologists, physicists do not really know the truth. They just have to pretend they do or they wouldn't get their grant money.

Answer 2

The evidence about dark matter is backed up By general relativity In Einstein field equation where a mysterious force exists in the field equation.
Also the equation of the cosmological constant contains a mysterious energy density.The mysterious energy denstity is basically a energy per unit volume which indicates a pressure of space. So Einstein had a solution for a Unified force in his equation and did not realize it.
This mysterious energy in space is called dark energy.So space is no longer an empty entity but constains a substance called dark matter carrying dark energy.
Perhaps dark energy is not visible and would never be seen,neverthe less its effects have been observed by scientists in Cosmology.
So the idea that light travels in empty space has now become a misnomer in 21st Century Cosmology.

Answer 3

Yes.

Answer 4

Hi. That's the theory.

Answer 5

Yes, I believe that that is true.