This is a question that has bothered me for years and since there are some smart people here, maybe someone can explain it to me.
They say that the universe is expanding. I have read and studied the evidence and I have to agree that most of the stars and galaxies are moving away from us and therefore the visible universe is getting larger.
They say that the universe is expanding faster today than it was yesterday. That is where I have a problem.
The closer galaxies are not moving as fast away from us as the ones farther away from us.
We see the light from galaxies that are the farthest away from us is more red shifted than the galaxies closer to us. This means that the galaxies farther away were moving faster long ago than the galaxies closer to us when we see that light.
Say we pick a galaxy that is 10 billion light years away. 10 billion years ago when that light left that galaxy, it was red shifted a lot. If we pick a galaxy that is 5 billion light years away, it is not as red shifted. So the farther we go back in time, the faster things are (were) moving. But more importantly, if we don't go back as far in time, galaxies are not moving away from us as fast.
To me that makes a strong case for the expansion to be slowing down, not speeding up.
Since this is a music forum,I should explain what this has to do with music. If the Universe is actually slowing down in its expansion, then we have more time to compose than if the universe is accelerating. This could make a difference of hundreds of billions of years for me to compose more music.
So you can see why I am so concerned over this matter.
EDIT:This also means we may not have to worry if Gary gets out GPOA as fast as he wants.