Hmmm... how about Foothold in the Stars, or just Foothold for when people stop being formal and poetic about it. No planet will last long with the name "Foothold in the Stars" once they build a Burger King there.
I choose this name because, by the time we found this planet (even if we found it tomorrow) overpopulation will have begun to be a problem. The second planet we inhabit can never be allowed to be the last, because we will soon fill it and use enough of the resources so that we need to start making difficult choices again, whether they be about resource gathering or population control.
Once we are able to expand to other worlds, we will need to keep doing so. So that's why I would call it Foothold, because it's a new start but it is not, and can not, be the end.