3 ms·
> The speed of light is far too slow. Solar system escape velocity is about 5.5% of c according to a quick web search. So ca. 3000 years for 100 ly, allowing f
by tuatoru 6y ago
> The speed of light is far too slow.
Solar system escape velocity is about 5.5% of c according to a quick web search. So ca. 3000 years for 100 ly, allowing for acceleration and deceleration. The aliens would be fanatics to still be interested after that time.
But in order to come to rest here, they'll have got around the laws of thermodynamics and the momentum-kinetic energy relation to produce engines with impossibly high specific impulse, thrust and efficiency.
What we'd do is watch them whizz past.
- FridayoLeary 6y ago>3000 years for 100 ly, allowing for acceleration and deceleration. The aliens would be fanatics to still be interested after that time. Have you taken into account the relativity of time? If i've understood it correctly, time stops at the speed of light. For an alien travelling at that velocity, moving from one end of the universe to the other will take no time at all! No fanaticism required. How will they have time to stop? Also, does anyone know if an object with mass even move at the speed of light?