Question

What does "t-minus" mean when counting down to rocket liftoff?

Answer 1

Explanation:

The "T" stands for the time at which the rocket is scheduled to be launched. T minus 4 minutes and 49 second indicate 4 minutes and 49 second before the launch. Eventhough the last ten seconds are counted in most of the case as 10,9,8,7,....,3,2,1.

Heyy mate

Hope it helps