“Faster than light travel is not possible”
Yeh but Alpha Centauri is only 4 + light years away. So if you could go almost the speed of light you could make the trip in 3 TV seasons, some reruns and a couple of movies. Just ask the Robinsons.
Not the way most people think of it, no. But if you’re saying getting from point A to point B in our Galaxy faster than a photon of light can isn’t possible, look up Miguel Alcubierre. And Harold White at NASA. And even this paper, “Breaking the warp barrier: hyper-fast solitons in Einstein–Maxwell-plasma theory” , published in the Journal of Classical and Quantum Gravity, by Erik W. Lentz.
Due to time dilation, the trip would only seem to last about 65 days to the travellers, if done at constant velocity of 99.9%c and no time allowed for acceleration and deceleration (obvious issues).
“The time dilation factor is (1 - f^2 )^0.5 , where f is the fraction of light speed.
“(This means that the experienced travel time that passes inside the ship approaches 0 as f approaches 1. If you could travel arbitrarily close to light speed, you would experience the journey as effectively instantaneous.)
“Here’s a calculator for it:
http://www.emc2-explained.info/Dilation-Calc/
“At .999c (99.9% light speed) it calculates that time is slowed down to 4.47% of the outside value. That means four years are experienced as approximately 65 days.
An interesting comment. Light waves do not experience time during their travel. When a light wave leaves the surface of the sun as an emission from the last atom in the sun’s atmosphere, and is absorbed by an atom in a sensor or your retina, from the POV of light, what happened was a collision between the atom in the sun and the atom in the sensor or your eye.