Hi, this is my first post here. I have been reading a book called "A short history of nearly everything" by Bill Bryson which has caused many sleepless nights and inspired me to sign up here to discuss some of them.
My first thought, as the title suggests, is to understand the expansion of the universe. I have Googled it and it appears to be of somewhat debate.
What do you think? Is the universe expanding or is time stretching? Is the expansion accelerating or slowing down due to the pull of gravity?
I hope this hasn't already been a recent discussion here!
Le-roy.