Started by René, September 07, 2019, 09:07:27 am
Quote from: Matt on September 10, 2019, 02:40:38 pmYou can't push past c, so there is no possibility of reversing time. To travel at the speed of c in an external reference frame, you travel at infinite speed in the moving frame. No matter how much faster you try to go beyond infinity, you are still travelling at the speed of infinity. To the external viewer this appear to be c. So it's impossible to go faster than this.
Quote from: Tangled-Universe on September 11, 2019, 06:40:52 amPBS Space Time is a great channel which answers many many questions and ideas discussed here:https://www.youtube.com/channel/UC7_gcs09iThXybpVgjHZ_7g
Quote from: Tangled-Universe on September 12, 2019, 08:12:09 amWe have no clear idea how large the universe is, we only know limits of our observable universe (constrained to the Hubble radius), but if there's intelligent life out there then some or perhaps all of it may be impossible to reach for us or impossible for them to reach us.