|Quoting Airlinerfreak (reply 0):|
Also to think that the speed of electromagnetic light in a vacuum otherwise known as space is 186,000 mp/h
|Quoting RJ111 (reply 6):|
The density could get very close to zero but could never be zero, unless all the dots are removed.
|Quoting Klaus (Reply 9):|
Unless a lot has changed since I checked last time, that idea has not survived Einstein´s theory of relativity. If there was such a thing, it would follow that the speed of light would depend on whether you´d be "at rest" with the ether or if you´d be "moving" against it. But the theory of relativity states - and has been consistent with observations so far - that the speed of light does not change with acceleration to a different (relative) speed; Ergo it doesn´t look as if there was an ether as a necessary medium for electromagnetic radiation (which includes visible light).
|Quoting Travelin man (Reply 12):|
'm currently reading a fantastic book about this very subject called "The Fabric of the Cosmos" by Brian Greene. It explains the relationship between time and space and how our current understanding of the universe came to be. I highly recommend it.