how did they know that the space could expand?
Posted by PG1995, at hsm.stackexchange.com,
The theory of general relativity was formulated around 1915 which could be summed up in words of John Wheeler, "Space-time…
The theory of general relativity was formulated around 1915 which could be summed up in words of John Wheeler, "Space-time…
I was reading this article, https://earthsky.org/space/this-date-in-science-edwin-hubble-and-the-expanding-universe . Please…