The conversation between human and AI assistant.
Is it theoretically possible to travel a light year in under one year due to length contraction and other relativistic effects?
Wow, that's incredibly fast! Would there be any observable effects for a crew traveling at that speed?
Yes, due to time dilation, time would appear to slow down for the crew on the spaceship. For every day that passes on the spaceship, around 7 years would pass on Earth. Also, as the spaceship approaches the speed of light, its mass would increase, making it more difficult to accelerate further.