Interstellar

spoilers It was in a different star system. That's why they didn't visit it second

spoilers

Oh, OK. I thought Edmund's planet was the farthest of the three orbiting Gargantua.

spoilers

Remember at the beginning, they said there were planets in three different solar systems. I don't remember whether they explicitly stated that it was in one of the other systems, but if their fuel budget originally allowed for a round trip to one of these other systems (and it would have to, to maintain the ruse), then the dialogue about the fuel heavily implies it.

Now I want to see it just to unspoil the spoilers.