The Hafele-Keating experiment (https://en.wikipedia.org/wiki/Hafele–Keating_experiment) demonstrated a consistently observed time difference with atomic clocks flown around the world and a stationary one. This proved gravity affects the flow of time and altitude changes how fast time progresses - although by small margins that we can't feel. But, go fast enough or at a sufficiently high gravity and your time will slow in relation to anyone on the Earth - Alpha Centauri is about 4 light years, and at 99% of c, you would take about 200 days to travel each way (the time dilation effect also dilates the distance between the two points by a factor of 7). To an observer on Earth, you would appear to take just over 8 years to get there (4 years to get there, and 4 years for the light to come back), but your return would see you arrive shortly after the telescopes showed you arriving at Alpha C - about 2 weeks later... So, you would be ~400 days older, but Earth would be ~8 years older. Further afield and it gets more pronounced. My head now hurts. I'm too old for physics
You can. I can set off from Barnsley at 1 p.m. and be in Scarborough at 3 p.m. There, I've travelled in time....
The physics is spot on. However, as your speed approaches light speed, your mass tends towards infinity. Thus means that the energy required to reach 99% of light speed would be almost incalculable. Also it would be quite difficult to slow down when you get to Alpha Centauri at the speed and you would have to accelerate again for the return journey. All of which suggests that this would not be a practical proposition. This would also suggest that interstellar travel is effectively impossible on human lifetime scales. Ergo we have never been visited by alien spacecraft - unless warp drive is possible....
The US government has effectively admitted that these things are real and not imaginary or glitches on radar etc. But as to what they are, what they are doing here and where they come from is not possible to ascertain with our current technology. These things seen in our skies can do things that leave our most advanced aircraft for dead. I think the phenomenon exists but have no clue as to what they are!!
Time travel IS possible, just go to Thurnscoe, you're in the 1970s.... No offence intended to Thurnscoe residents, I spent my first 4 years there.
Saw a quite noted incident that occurred over Sheffield in the early 80's. it was basically a light travelling along the horizon just after dusk. thing is it was going faster than Bruce Dyer onto a through ball. but as some have pointed out correctly UFO is unidentified object ....just that, not a alien life force
Another thing with UFOs is that they're always portrayed as big/spaceshippy type objects. Who's to say that aliens can't be very tiny and almost unobservable to the human eye?
When I go skiing it's the other way round. Since my mass is tending towards infinity, my speed approaches light speed. Then I come back to earth and go in a bar to drink beer at warp speed.
I feel sorry for the folk in Liverpool, who have given up all hope and now find themselves in a dark lonely place . When on being told, that there is light, at the end of the tunnel, suddenly realise its only Birkenhead
I went in a pub in Scarborough one afternoon a few years ago, there were several Neanderthals in there. Does that count as time travel? Funnily enough it was about 3pm
Maybe our universe is just scientists messing about with atoms. Worlds within worlds. The possibilities are infinite.
Maybe we are just tiny components in an almost infinitely big being. Or, maybe we are actually alone in the universe and the theory of there being some other entities out there is a load of bollo.x even though it sounds logical. Perhaps somewhere there is a planet of the apes. Perhaps there's a planet of ferocious bunnies. Perhaps there isn't....
That ties in with the Professor Bryan Cox documentary about quantum mechanics. It was a good watch if nothing else. He used Lego men and Dinosaurs as his paradoxes.
