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  2. Clock of the Long Now - Wikipedia

    en.wikipedia.org/wiki/Clock_of_the_Long_Now

    The Clock of the Long Now, also called the 10,000-year clock, is a mechanical clock under construction that is designed to keep time for 10,000 years. It is being built by the Long Now Foundation . A two-meter prototype is on display at the Science Museum in London.

  3. Countdown - Wikipedia

    en.wikipedia.org/wiki/Countdown

    After a launch, most countdown clocks begin to show Mission Elapsed Time, which is typically shown as "T plus." The adjacent picture shows "+00:00:07", approximately seven seconds after liftoff. The time T−0 is specifically the moment of launch commit, when it is no longer possible to prevent liftoff. This is necessarily slightly before the ...

  4. Timer - Wikipedia

    en.wikipedia.org/wiki/Timer

    A typical kitchen timer. A timer or countdown timer is a type of clock that starts from a specified time duration and stops upon reaching 00:00. An example of a simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software.

  5. Doomsday Clock - Wikipedia

    en.wikipedia.org/wiki/Doomsday_Clock

    The Doomsday Clock is a symbol that represents the estimated likelihood of a human-made global catastrophe, in the opinion of the members of the Bulletin of the Atomic Scientists. [1] Maintained since 1947, the Clock is a metaphor, not a prediction, for threats to humanity from unchecked scientific and technological advances. That is, the time ...

  6. Prague astronomical clock - Wikipedia

    en.wikipedia.org/wiki/Prague_astronomical_clock

    The Orloj is mounted on the southern wall of Old Town Hall in the Old Town Square.The clock mechanism has three main components – the astronomical dial, representing the position of the Sun and Moon in the sky and displaying various astronomical details; statues of various Catholic saints stand on either side of the clock; "The Walk of the Apostles", an hourly show of moving Apostle figures ...

  7. Shot clock - Wikipedia

    en.wikipedia.org/wiki/Shot_clock

    A shot clock is a countdown timer used in a variety of games and sports, indicating a set amount of time that a team may possess the object of play before attempting to score a goal. Shot clocks are used in several sports including basketball , water polo , canoe polo , lacrosse , poker , ringette , korfball , tennis , ten-pin bowling , and ...

  8. Launch Complex 39 Press Site - Wikipedia

    en.wikipedia.org/wiki/Launch_Complex_39_Press_Site

    A large illuminated digital countdown clock and a flagpole flying an American flag on the edge of the turning basin have often been included in television coverage and launch photos. Before a launch, the clock counts down, showing the remaining time until T-zero in hours, minutes and seconds (–00:00:00). After launch, the clock counts forward ...

  9. The Button (Reddit) - Wikipedia

    en.wikipedia.org/wiki/The_Button_(Reddit)

    Sixty seconds later, the countdown timer reached zero and ended two months and four days after it had begun. The button was deactivated, and overlaid with the text "the experiment is over". [14] Six minutes later, Wardle announced that the forum would be archived within ten minutes. [15] The experiment ended with 1,008,316 logged button clicks. [2]