I thought so too until I saw the rallies <| sep |> 878 I ' d love to get Payday 2 My favourite game ' s story is Bioshock . The setting is so immersive and it is truly a work of art , not just a video game . <| sep |> that ' s a fake comment <| sep |> Thanks , fixed the spelling now D <| sep |> That is definitely a bit off . At . 999 c for 1 week in the ships reference frame , someone on earth would experience about 22 weeks , which is a far cry from the 100 years you are hearing . You can compute this using the following equation from special relativityT T 0 sqrt 1 v 2 c 2 where T is the is the time experienced on earth , T 0 is the time experienced in the ship , and v is the velocity of the ship relative to earth . If you google time dilation , you can go into a bit more depth . Source Physics Graduate Student .