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class, inequality, social media, and the public sphere - mammoth ...

rholmes

hu, 10 Sep 2009 19:41:56 GM

class, inequality, social media, and the public . sphere. . A fascinating talk by Danah Boyd, transcribed at alternet, first presenting the evidence of class divisions in social media, and then addressing what the implications of that ...

What if a deep space probe slammed into the celestial sphere?
Q. What if Aristotle and Ptolemy were right? What if the Voyagers 1 and 2 crash into the celestial sphere? How would that change our space program and our view of our place in the universe?
Asked by Link - Sat Aug 25 14:53:12 2007 - - 5 Answers - 0 Comments

A. Aristotle and Ptolemy didn't say there was a single celestial sphere. They said there were many spheres (one for each visible solar system object), at varying distances from the Earth, and all concentric. All the way out to the one holding the "stationary" stars. If they were right, then Voyager 2 (the first of the two to launch) would have proved it 30 years ago, when it would have shattered the one containing the Moon. Interestingly enough, that didn't happen. Nor did it happen later when they passed through the "spheres" of Mercury, Venus, the Sun, Mars, Jupiter, etc., etc. Nor when numerous other probes passed through various "spheres" over the twenty years before them. To hold that the solar system is composed of mostly empty… [cont.]
Answered by skeptik - Mon Aug 27 21:18:37 2007