In reality, there are 1000’s of potential planets that have been found that could be life-sustaining.
In the game in year 2, further advances rule out all of those planets apart from Kepler 62e. Kepler 62e becomes the only found planet with a sustainable habitation for life. (This is mentioned in the news section).
Edit: I can easily add the chance to name the new planet (1200 years on a spaceship should be plenty of time!), but that choice can’t be reflected in the name of the game. At least until a name is decided upon, Kepler would be the common term.