Question: where does the phrase t minus come from
Answer: NASA commonly employs the terms `` L - minus '' and `` T - minus '' during the preparation for and anticipation of a rocket launch , and even `` E-minus '' for events that involve spacecraft that are already in space , where the `` T '' could stand for `` Test '' or `` Time '' , and the `` E '' stands for `` Encounter '' , as with a comet or some other space object .