Recent content by M31

Simply put, yes.

v2kkim, Ich, Thank you for the replies. I find this material absolutely fascinating. So, if you'll allow, let's dig a little further. Say I am in a spacecraft that can travel at 1x the speed of light, and it takes me 7 days (just for the sake of discussion) to get to the nearest...

I agree with you on priniciple, but I guess what I am looking for, among other things, is a 'what are we using for a standard' type of avenue. To be more precise, how distant have the extrapolations been applied, and held up? If the speed of light cannot be 'tested', say for example, from...

Hello all, I have just discovered (and joined) the Physics Forums, and want to ask a question which I have been wondering about for a long time (please forgive me if this has been covered here before): How do we know that the speed of light is constant throughout the universe if we have...