We get a lot of questions in the live chat room asking “when is the shuttle going to launch” and confusion when people think it will launch in 20 minutes because that is what they see on the T- clock. This video attempts to explain the difference between the T- and L- clocks and let you know when the heck the shuttle is really going to launch!



  1. frag971 says:
    August 27, 2009 at 1:27 am

    [..YouTube..] Thanks SVC :)

    Reply
  2. frag971 says:
    August 27, 2009 at 1:27 am

    Thanks SVC :)

    Reply
  3. RagingGeneral says:
    August 27, 2009 at 3:43 am

    [..YouTube..] wow no wonder these people have no views.

    Reply
  4. RagingGeneral says:
    August 27, 2009 at 3:43 am

    wow no wonder these people have no views.

    Reply
  5. mrmaciejm says:
    August 27, 2009 at 6:24 am

    [..YouTube..] I like these new pod casts. Short and to the point.

    Reply
  6. mrmaciejm says:
    August 27, 2009 at 6:24 am

    I like these new pod casts. Short and to the point.

    Reply
  7. meazle says:
    August 27, 2009 at 6:35 am

    [..YouTube..] But all the countdown clocks on the nasa site are T-minus clocks.

    Reply
  8. meazle says:
    August 27, 2009 at 6:35 am

    But all the countdown clocks on the nasa site are T-minus clocks.

    Reply
  9. JetForMe says:
    August 27, 2009 at 8:40 am

    If you’d like to keep track of both the T-clock and the L-clock on your iPhone or iPod Touch, check out MissionClock: http://bit.ly/missionclock

    Reply
  10. railgunmaker says:
    August 27, 2009 at 10:21 am

    [..YouTube..] ty – did not know that! :0

    Reply
  11. railgunmaker says:
    August 27, 2009 at 10:21 am

    ty – did not know that! :0

    Reply
  12. gvseostud says:
    August 27, 2009 at 9:09 pm

    [..YouTube..] I’ve been in space biz for 25+ years and this is the best description of the difference between T-clocks and L-clocks I have ever seen – job well done!

    Thanks to Spacevidcast for this great primer.

    Reply
  13. gvseostud says:
    August 27, 2009 at 9:09 pm

    I’ve been in space biz for 25+ years and this is the best description of the difference between T-clocks and L-clocks I have ever seen – job well done!

    Thanks to Spacevidcast for this great primer.

    Reply
  14. peteuplink says:
    May 15, 2011 at 4:59 pm

    Never did know why there was two clocks. Thanks for clearing that up :)

    Reply