Is every observable Galaxy receding from us?

Question

If the universe started from the big bang, why are all galaxies receding from us? Why wouldn't we be overtaking any galaxies; why wouldn't any other galaxies be overtaking us?

Answer 1

The space between the galaxies is what is expanding. Imagine raisin bread being baked. As the bread rises, each raisin moves away from every other raisin. Another way to visualize this is by drawing dots on a balloon then blowing the balloon up. As the balloon get's bigger, each dot moves further away from every other dot. It's the same for galaxies.

Now the expansion of the universe is only detectable at extremely large distances. Nearby galaxies like M31 can move towards us. But most galaxies we see are extremely far away, so almost all of them are receding from us.

Answer 2

For this we have to "imagine" or "visualise" an exploding grenade. Upon explosion, all the components of the original matter of the grenade will be flung off, some in different directions, and some, though apparently in "similar" directions, their paths will be diverging through the course of time. Such divergence will show a relative displacment of distances away from each other.
Those that are further away, logically were moving at higher initial velocity. In a vacuum, there is no forces to retard the motion of the "flung off" velocity of the bodies (galaxies, stars, etc), and the distances of the furthest galaxies are measured to be proportional to their travelling speeds. By the same reasoning, slower galaxies, due to their slower initial velocity, should not be able to overtake ours. However, the gravitational energy of black holes may be able to retard such "expansion" of the universe, and reverse the process. If space is positively curved, the probability of such events is predicted.

Answer 3

There is a group of galaxies called the local group including the Milky Way and Andromeda for which the force of gravity is stronger (for now) than the repulsive force that is causing the continued expansion of the universe . These galaxies are staying grouped and at least one, Andromeda, is moving toward us on a collision course.

Answer 4

i'm an agnostic and no, i do not trust the large bang idea. that is maximum likely because i don't have sufficient understanding of the field. besides the undeniable fact that, i trust that the large bang idea might want to not have befell because it defies such a good number of guidelines and guidelines that I have realized by physics. there's no way i can see that each and every thing contained in the universe may were compacted into one aspect, one atom and with none exterior suggestions, strengthen straight away to the universe because that is on the prompt. i imagine that this "idea" replaced into created with the intention to describe a happening (the starting up of the universe and time) that people won't be able to make sure out. people won't be able to image the existence of a probability that the universe may were indefinite, and not using a starting up or an end and hence a idea replaced into created with what I evaluate bogus information with the intention to fulfill the individuals's crave of an answer to a idea they refuse to carry close.

Answer 5

No, the Andromeda Galaxy is hurling towards us at an amazing rate and our two galaxies will someday collide.

Answer 6

Film at 11:00.

Answer 7

The classic analogy for the expansion of the universe is to put a bunch of dots on the balloon. As you blow it up, all the dots move away from each other, but there is no central dot.:
http://en.wikipedia.org/wiki/Expanding_Universe

Answer 8

This is because the universe expands uniformly, i.e. its rate of expansion is the same everywhere. As a result, galaxies closer to the "heart" of the universe go slower than the ones further out.

Now take three galaxies, one closer to the "heart" than our own, one exactly as far away as our own, and one further away:
- the one closer moves slower than we do, and so we move away from it -- or from our perspective, it moves away from us;
- the one exactly as far out as we are would move as fast as we do, but because we are moving in different directions it is moving away from us;
- the one further out moves faster than we do, and so moves away from us.

Conclusion: every other galaxy moves away from us, whether it is closer to the "heart", further away, or exactly as far away as we are!

Answer 9

no the andromeda galaxy has a slight blue shift. meaning it's coming twords us. also it takes billions of years for galaxies to collide.

Answer 10

to the respondents. i do believe every answer is FOS. how can you conjure these statements and be assured of there truth? science holds and condemns this folly.