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Published on Apr 7, 2012

The moon may be 1.3 light-seconds away, but why on earth do we measure distances using time?

minutephysics is now on Google+ - http://bit.ly/qzEwc6
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And twitter - @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Music by Nathaniel Schroeder
NEW ALBUM!! -- http://juliansaporiti.bandcamp.com/al...
youtube: http://bit.ly/pakJLE

Thanks to Ross Diener for contributions and to Perimeter Institute for support.

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Top Comments

  • mj k

    mj k 2 weeks ago

    just like their comments and pretend to be smart...

    · 98

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    in reply to Hector Bergman (Show the comment)
  • EndOfDayz727

    EndOfDayz727 1 week ago

    HOW MANY TIMES HAVE U GOTTEN LAID THIS WEEK?

    2 FEET!

    · 21

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All Comments (2,916)

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  • Paul Vinell

    Paul Vinell 5 hours ago

    I agree.

    ·

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    in reply to Maxxwel Bacon (Show the comment)
  • Maxxwel Bacon

    Maxxwel Bacon 1 day ago

    I'm too stupid for these videos.

    ·

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  • Will Wei

    Will Wei 2 days ago

    Please go and shove that iPad up your ass. Have a nice day.

    ·

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    in reply to Jagalskarkatter (Show the comment)
  • GREEKILLERrtw

    GREEKILLERrtw 2 days ago

    Ahh I get it now (I might have scratched off all hair from my head). 8000 ft. of film for 2 hours of movie . 8000/120 min = 66 2/3 gives us ft. of movie film for a minute . the movie is 1min 30sec , it is 1.5 min approximately. Now multiply 66 2/3 and 1.5 to get feet of movie used to make this . then convert feets to metres and it would be about 30 meters.

    ·

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    in reply to mj k (Show the comment)
  • Matthew Whiteley

    Matthew Whiteley 3 days ago

    planes use air to work and there is in air in a vacuum .

    ·

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    in reply to jobberble (Show the comment)
  • DoctorWhoovesX

    DoctorWhoovesX 3 days ago

    You forgot to add turtle

    ·

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    in reply to pmac139 (Show the comment)
  • eilsel yiu

    eilsel yiu 3 days ago

    minute physics is 30 cm away from my eyes :P

    ·

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  • minecraftplayer847 .

    minecraftplayer847 . 4 days ago

    what about a turtle

    ·

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  • jobberble

    jobberble 4 days ago

    18 AIRPLANE DAYS AWAY FROM THE MOON, WHY CANT WE GO THERE NOW!!!

    ·

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  • wratched

    wratched 4 days ago

    nanoseconds are sometimes called lightfeet. I'm not sure by whom though.

    ·

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