>The speed of light being an absolute limit to how fast we can travel (or even communicate), means most of the universe (even most of the galaxy) will be foreve

>The speed of light being an absolute limit to how fast we can travel (or even communicate), means most of the universe (even most of the galaxy) will be forever out of reach to us. And that's kinda depressing. One-way space travel would still be possible using constant acceleration: >A spaceship using significant constant acceleration will approach the speed of light over interstellar distances, so special relativity effects including time dilation (the difference in time flow between ship time and local time) become important. >At a constant acceleration of 1 g, a rocket could travel the diameter of our galaxy in about 12 years ship time, and about 113,000 years planetary time. https://en.wikipedia.org/wiki/Space_travel_under_constant_acceleration#Interstellar_travel https://en.wikipedia.org/wiki/Space_travel_under_constant_ac... https://en.wikipedia.org/wiki/File:Roundtriptimes.png https://en.wikipedia.org/wiki/File:Roundtriptimes.png