Dark matter pretty can serve well in an explination that our universe is infinite correct??

Answer 1

Recently I read an article about this. (Science News Weekly that I just dug out to help me answer your question) In this articles they explain how astronomers watched as 2 galaxies collided. Theory dictated that normal matter and dark matter would behave differently during this collision. They say that the normal matter of the two galaxies would "drag" at each other slowing it down but that dark matter doesn't experience this dragging effect. After the collision most of the gravity (observed using gravitation lensing do an Internet search if you don't know what that is) had moved away from the normal matter, even though we couldn't see anything where this gravity had moved to. This pretty much proves dark matter's existence. Now to actually answer your question, dark matter has nothing to do with the size of our universe. It is only used to explain the puzzle of solar system gravity (which we can predict using mathematical models) versus galactic gravity (using the solar system models, the galaxies would fly apart because there doesn't seem to be enough gravity to hold everything in place)

Long answer, still no. LOL

Answer 2

The theory of dark matter arose as a way to explain how galaxies don't fly apart. Scientists did many studies and simulations and found that galaxies shouldn't stay together the way they do based on what we currently know about them. In fact it seems that around 95% of the matter necessary to create the overal gravitational effects that we see doesn't exist according to our current observations. The theory of dark matter is that there is a whole ton of this dark matter that we can't see or detect currently out there that accounts for all this gravity that holds things together.

Answer 3

Dark matter was invented to explain the rotation of galaxies.
It was done under the assumption that galaxies are satellite systems,which may not be the case,and therefore it may not be necessary.
Dark matter or not the universe is a finite entity,one time in the past it did not exist and sometime in the future it will go out of existence.

Answer 4

Short answer no