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Looking Down a Well: A Brief History of Geodesy

Geodesy is a field of study that deals with the measurement and representation of the Earth, and it all started when a clever human named Eratosthenes discovered that you could measure the circumference of the Earth by looking down a well. Over time, the field of geodesy has expanded and evolved dramatically, and NASA uses technology like radio telescopes, ground surveys, and satellites to contribute! Learn more about geodesy in this video!
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Learn more about geodesy in this video!    Learn more about geodesy in this video!

For complete transcript, click here.
Duration: 2.7 minutes
Available formats:
  1280x720 (29.97 fps) WMV (Windows Media) 80 MB
  640x360 (29.97 fps) QT (QuickTime) 66 MB
  1280x720 (29.97 fps) QT (ProRes) 1 GB
  960x540 (29.97 fps) MPEG-4 (AppleTV) 69 MB
  1280x720 (29.97 fps) QT (YouTube) 88 MB
  640x360 (29.97 fps) MPEG-4 (iTunes HD) 27 MB
  320x240 (29.97 fps) MPEG-4 (iPod) 14 MB
  960x540 (29.97 fps) WEBM         34 MB
  320x180     PNG           172 KB
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Short URL to This Page:http://svs.gsfc.nasa.gov/goto?10910
Animation Number:10910
Completed:2012-02-03
Animator:Chris Smith (HTSI) (Lead)
Video Editor:Chris Smith (HTSI)
Narrator:Steven J. Wall (MUNIZ)
Producer:Chris Smith (HTSI)
Scientists:Herbert Frey (NASA/GSFC)
 Frank Lemoine (NASA/GSFC)
 Stephen Merkowitz (NASA/GSFC)
Writer:Chris Smith (HTSI)
Series:Narrated Movies
Goddard TV Tape:G2012-003 -- Looking Down A Well: A Brief History of Geodesy
Please give credit for this item to:
NASA/Goddard Space Flight Center
 
Keywords:
SVS >> Earth
SVS >> HDTV
SVS >> Music
SVS >> Satellite
SVS >> Edited Feature
SVS >> Interview
DLESE >> Narrated
SVS >> Radio Telescope
SVS >> Geodesy
 
 


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Many of our multimedia items use the GCMD keywords. These keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0

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