in weinberg's first three minutes he wrote:
I'm starting to regret reading this book. he came out with an updated edition in 1993 but it looks like he didn't correct his mistakes. it looks like he just put a small forward at the end of the book because clearly there are some things that were known in 93 but not in 79 that should have forced him to correct some passages. in any case dark energy was not known until 1998, so i just want to make sure that galaxies are rushing apart due to dark energy and that the above passage is wrong.The galaxies are not rushing apart because of some mysterious force that is pushing them apart, just as the rising stone in our analogy is not being repelled by the earth. Rather, the galaxies are moving apart because they were thrown apart by some sort of explosion in the past.