![]() ![]() ![]() The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. That’s the “T-minus” countdown “T-minus 10 hours.” (Photo Credit: DLR German Aerospace Center/Wikimedia Commons) Imagine that NASA would launch a rocket in 10 hours. What does T minus mean on a rocket Countdown? That’s the “T-minus” countdown “T-minus 10 hours.” The closer the time of launch approaches, the more the countdown will be “T-minus 9 hours,” “T-minus 5 hours,” “T-minus 55 minutes,” etc., until it reaches the most iconic part of the launch countdown – the last 10 seconds before launch. What does the countdown T Minus 10 hours mean? “T minus fifteen seconds” = “Fifteen seconds until launch.” The quantity of time remaining before “t,” which typically means “time” or “test.” It is well-known from its usage in the field of space exploration during the countdown to launch. What does T minus fifteen seconds in space mean? The “T” in the “T-minus” can also stand for “test.” Technically, the “T” in “T-minus” is an indicator of the main sequence countdown time, which serves as a synchronization device for most devices and procedures that must be completed before, during, and after launch. The term is said to date back to Shakespearean times when male theatrical actors would play female roles. An acronym for “Dressed Resembling A Girl”, from which the term “Drag” is said to ostensibly originate. Launches of the Space Shuttle to the International Space Station did not allow for holds to be extended due to the launch window which was limited to no more than 10 minutes due to the 90 minute orbit period of the station and speed of Earth’s rotation (913.6 miles per hour (1,470.3 km/h) at the Kennedy Space Center). Why can’t a shuttle take off before 10 seconds? Under some circumstances, a countdown may be recycled to an earlier time. Some holds are planned: they are done so the launch-support computers can run automatic checks on the rocket. This can be done to investigate a technical process that has gone wrong, or because of marginal weather at the launch pad. The last ten seconds are usually counted down aloud “Ten seconds to liftoff. “T minus Time” is a system to mark points at which actions necessary for the launch are planned – this time stops and starts as various hold points are entered, and so doesn’t show the actual time to launch. 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 … During planned holds in the countdown process (when the countdown clock is intentionally stopped), the T- time also stops. T- (pronounced “T minus”) refers to the time remaining on the official countdown clock. Thus, the T-time can be stopped according to pre-planned holds in the launch procedure. There are pre-planned holds in the countdown process, during which time the T-time is also stopped. ‘T-minus’ refers to the time remaining (until the launch) on the official countdown clock. 6 What does T minus mean on a rocket Countdown?.5 What does T minus fifteen seconds in space mean?.3 Why do rocket launches have countdowns?. ![]()
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