Question in the title. A Rogue planet is a sunless world that exists in interstellar space. It might be possible for life to develop on one, but what happens when that happens?
I've seen people say that plants could not develop on these worlds. But there's the theory of Thermosynthesis, which is almost what I'm looking for. But would it be possible to absorb infrared photons? What is the most efficient color to absorb infrared light? I've heard different things about nonvisible light's albedo, and can find nothing to confirm one way or another.
I saw this, and I can see nowhere on it that mentions the color of plants.