There are many good books on this subject. Interested parties can have a look:
Hawking's famous A Brief History of Time
Kip Thorne Black Hole and Time Bending
Sixty years in a shell and the future of time and space (both co-authored by Hawking and many others)
And Hoffman's frontier of physical astronomy. In short, if you are interested in this kind of problem, there will be many interesting books in the popular science counters of major bookstores, and there is a good website, which I think you should have heard of or been to. It's Sansi Science Network, and the information in it is really valuable.