Please help me on: the history of the universe?

Question

1. in which direction are nearly galaxies moving relative to Earth?

2. What is the general relationship between a galaxy's distance from Earth and its speed?

Answer 1

1.Nearly everything is moving away,
2.The further away the faster they are moving.

We know this because of Doppler effect. Everything is red shifting. If things were moving towards us they would be seen towards the blue end of the spectrum. Imagine the universe as a balloon covered in polka dots. If you concentrate on any dot as you are blowing it up all the other dots would seem to be getting further away. This is because we are all expanding further away from each other.
o.k. I noticed the thumbs down. Probably because I said everything is moving away. This is not quite true. On a local level some stuff is still gravitating towards us, Andromeda for instance will be absorbed by the Milky Way. But once all the local clustering is finished we will continue to grow apart from everything else on a universal scale, forever.

Answer 2

I did some digging and found that if the big bang theory is correct, the universe that emerged from the big bang is the same universe now as it was when it was created, but has much more volume. So the center of the universe is essentially everywhere.
This being the case all galaxies are apparently moving away from each other , but you do have some collision within the local groups?
The further away a galaxy is from earth the more red shifted it is and the greater the velocity is relative to Earth.

Answer 3

There are two groups of galaxies. Those in the local group and those not in the local group. Galaxies tend to cluster, that is there will be a group of galaxies close together and then vast distances between adjacent local groups. Galaxies in the local group will eventually combine and make one big galaxy. There are about 40 Galaxy's in the local group that the Milky Way is a part of. The two largest Galaxy's in the local group are the Andromeda Galaxy some 2.5 million light years away the Milky Way. They will some day many many years from now combine. All of the other Galaxy's in the local group are much smaller and will be absorbed by the two large Galaxy's.

As for your second question all Galaxy's (except those in the local group) are moving away from us. The farther away they are the faster they are moving. One day many many years into the future, Galaxy's will have moved (if current theory is correct) so far away so fast that we won't be able to see them.

D. bumstead =:)

Answer 4

the universe is increasing
No galaxy is closing on us
But it has been found that
Out of 43 galaxy two are really closing

Answer 5

All Galaxies are moving away from the earth.

The farther away they are the faster they are moving.