And so the assumption is that T stands for time. You hear us talk in the Launch Control Center about T-9 minutes, T-20 minutes, etcetera. I have always assumed that it means "takeoff," but according to Shuttle Launch Director Mike Leinbach, it stands for "test": Abigail from Pembroke Pines: I've heard that during a launch countdown the "T" in T minus does not stand for "Time." If so, what does the "T" really mean? I would be happy to know also, that's the sort of question I dread been asked by a group of school children. I always thought it was short for Takeoff, but I'm happy to be proven wrong. It's possible that it could stand for something much more esoteric. I've always understood it as "Time." However, that's my armchair understanding. "When doing the countdown and they say T minus 10 minutes, what does the T mean?" I had no answer but am sure I know deep inside my head but need refreshing. She is not normally interested in space stuff but surprised me even more when she asked: Trouble is I was surprised when the wife took it first. Have just been out for a sit in the park and a read of Buzz Aldrin's latest book.
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