Planetship is both a planet AND a ship, it's also a party bus holo-lounge spice freighter rocket boosting thorium burning well oiled supermachine, get it? You will after a harrowing yet surprisingly relaxing journey through the chaotic void realms of strangespace!
So here's the deal, you've got to find a new planet for humanity to call home in the far future, a real nice spot with all the trimmings: liquid water, the right temperature, not too much or too little mass and atmospheric conditions conducive to keeping homo sapiens alive. We've even done a pile of research FOR you and marked habitable zones with the potential for an Earth-like planet on your starmap, so navigate yourself to a green zone and pick out a cozy little pad for the crew. What could possibly go wrong?