In the avatar universe, the interstellar starships can reach 0.7 C / speed of light using Antimatter - Matter engines. We currently understand enough about Antimatter physics to know such engines and speeds are theoretically possible.

Therefore, the time of flight to Prox A, ~4 light years away, should roughly take ~6 years.

gyunikument1_j2cguh1 wroteReply to comment by

maria_slayerinCould we find a Pandora-like planet in real life?bylemonny3663In the avatar universe, the interstellar starships can reach 0.7 C / speed of light using Antimatter - Matter engines. We currently understand enough about Antimatter physics to know such engines and speeds are theoretically possible.

Therefore, the time of flight to Prox A, ~4 light years away, should roughly take ~6 years.