In other words, some galaxies are expanding away from us. Are there any that are compressed behind us?
Everything is expanding away from everything else, there are no galaxies behind us or in front of us. Some galaxies are coming towards us but only because they’re near enough that their velocities are greater than the expansion velocity caused by expansion rate of the Universe.
Have a look at the rubber sheet explanation for the expansion to see what I mean.
November 30th, 2009 at 7:05 pm
Everything is expanding away from everything else, there are no galaxies behind us or in front of us. Some galaxies are coming towards us but only because they’re near enough that their velocities are greater than the expansion velocity caused by expansion rate of the Universe.
Have a look at the rubber sheet explanation for the expansion to see what I mean.
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November 30th, 2009 at 7:47 pm
I don’t fully understand your question… sorry
a position can’t be put on our location in the universe. Sorry.
but I do know that the universe is constantly growing. It’s cool like that.
Maybe scientists will make an extremely advanced GPS… maybe they’d call it a UPS! (universe-positioning-system)
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November 30th, 2009 at 7:58 pm
The Big Bang was not an explosion that spewed galaxies out into the void. There is no explosion and there is no void. Thus there is no "ahead" nor any "behind," because there is no line of galaxies flying away from any explosion. The universe is and always has been uniformly filled with matter/energy absolutely everywhere in space. All points in space are becoming more distant from all other points.
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November 30th, 2009 at 8:37 pm
If you could look at the universe from the outside you would see a sphere about 6 billion light years in radius.
It is expanding at the speed of light but the leading edge goes out of existence before it exceeds a radius of 6 billion light years.
Following this expansion is matter accelerating away from a center.and clumping into galaxies.
Galaxies are an end stage in the evolution of the universe with a life span of about 6 billion years.
We are about two thirds of the way towards the outer edge of the milky way and it took us about 4.5 billion years to get here.
A galaxy doesn’t change much over it’s lifespan it just gets smaller,ours at this time is about 100,000 light years in diameter,in 1.5 billion years the galaxy will be a mass of neutron density matter about 500,000 miles in diameter and at the end of it’s life.
Galaxies that follow us will take the same course and people like us that will observe us will still see our galaxy after it has gone out of existence,
The information required to estimate the actual age of the universe is lost after 6 billion years but it will likely go on after we are gone just as those other galaxies we see in our deep space photos do not exist today.
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November 30th, 2009 at 9:26 pm
there are two small galaxies that are beginning to collide with ours, and in time the Andromeda galaxy will collide with ours to form a much bigger galaxy.
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