%0 Video %T Philosophy 167: Class 11 - Part 12 - The Eclipses of Io: Cassini and the Speed of Light. %A Smith, George E. (George Edwin), 1938- %D 2015-09-03T17:40:57.790Z %8 2015-09-03 %I Tufts Archival Research Center %R http://localhost/files/wd376785s %X Synopsis: Observations of eclipses of Io caused the first speculation that planetary observations must be corrected for a measurable speed of light. Cassini resisted this idea for a long time.; Opening line: "The tables were saying the eclipse should happen at a certain time, and the kind of error was eight minutes in time."; Duration: 5:42 minutes.; Segment: Class 11, Part 12. %G eng %[ 1972-12-31 %9 Video %~ Tufts Digital Library %W Institution