farkas wrote: ⤴
Fri Sep 27, 2019 1:17 am
Exceeding the speed of light according to current theories is not possible. Travelling FTL is the stuff of SciFi.
is 299,792,458 m/s in a vacuum. The moment you get to 299,792,458.whatever
you are by definition
And honestly, I think ideas such as warp drive or some form of tunneling (hyperspace, etc.) are likely to be the source for whatever means might be developed to travel faster than light.
catweazel wrote: ⤴
Fri Sep 27, 2019 2:16 am
Us physicists don't cook turkeys at Christmas for that very reason. There is a non-zero probability that the neighbour's fully cooked turkey will quantum tunnel out of her oven and manifest itself on my table.
This is why you're an awesome 80-something, sir. I tip my hat in your direction.
Oh, incidentally, that same PBS Space Time series I linked to earlier had another episode which talks about the apparent contradiction you brought up later in this thread about c
and galaxies moving apart faster than c
. The short version is: space itself is expanding, therefore it's only the cumulative rate which appears to be >c
Vis a vis black hole spin rate, honestly I'm not sure how scientists determine if a black hole is spinning or not. I've never heard of there being something which would prevent
it, but at the same time, I think I'm on the same page as you: if you can't actually see
a black hole, how can you know
it is (or isn't) spinning?
Also, my read on the article I originally linked was the gamma rays were coming from the black hole itself. Nevertheless, if it's in orbit, what is deflecting it outward? Why do they seem to only
come from the poles?