'A super adventure to infinite space': How generation ships could bring us to stars

• The Universe is incredibly vast, so much so that traveling to even the nearest star could take millennia.
• Advanced propulsion could make the journey faster, but require significant scientific advances.
• Another possibility is to build spacecraft that can sustain generations of crew for the long journey.

For countless generations, people have dreamed of the day when humans will set foot on another planet. Even more ambitious is the dream of standing on another planet and looking up at an alien sun. Becoming an interstellar species is not just the stuff of science fiction. It's something that researchers and scientists have been studying for over a century.