What force hold the milky way and all other galaxies together?

Answer 1

gravity, duhh :P

lol yaa its kinda obvieous

The force that causes both, stars and galaxies to form is the gravitational force.

Answer 2

Gravity.

All matter is drawn towards each other by the force of gravity.
When something falls, it is being pulled towards the earth by gravity.
Gravity keeps:
the moon from flying away from the earth.
the earth from flying away from the sun.
the sun from flying away from the center of the Milky Way galaxy.
the Milky Way galaxy from flying away from the Andromeda galaxy.

Answer 3

This question has been perplexing astronomers for years.

When we look at the solar system objects that are further away from the sun orbit at a slower speed. When we examine stars in the galaxy however we do not see this we see something very strange. The stars on the outer edges of the galaxy are going far too fast not to be flung off as the centrifugal force should be much higher than the gravitational force if you take into account all the matter that we can see or theorise in black holes and stuff.

Scientist invented a material called "dark matter" to try to explain this. Estimates suggest that 60-90% of all the matter in the galaxy must be this strange dark matter. As of yet we have no idea what this matter is made out of, only that it cant be ordinary matter as we would see it. It must be some strange form of matter that emits no radiation but has mass.

Answer 4

Many people think that gravity holds a galaxy together, but this is only part of the answer. Gravity does hold it together, but without a little thing called Dark Matter, the whole system would collapse.

Answer 5

It has been postulated that black holes inhabit the center of every galaxy, including our own, whose incredible gravitational pull keeps the galaxies together.

Answer 6

Gravity.

(I was going to make a Star Wars "The Force" joke here, but decided not to. )

Answer 7

The gravitational type.

Answer 8

stability force

Answer 9

Gravity