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'''''"Empathy is Memory, Compassion, and Conscience: E=mc<sup>2</sup>"'''''- |
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'''Gabriel D. Velasquez (- van Diest)'''<br /> |
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:DOB: July 11, 1969<br /> |
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:POB: Santiago, Chile<br /> |
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:Home: Winnipeg, Manitoba, Canada<br /><br /> |
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'''Interests/Hobbies:'''<br /> |
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:Planetology, Extrasolar Planets, Habitable moons, Astrophysics, Climatology, Cosmochemistry.<br /> |
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:I enjoy photography, nature and wildlife.<br /> |
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:I am also artistic and creative.<br /> |
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:I started on this learning adventure because of the lack of any good freeware random solar system generators.<br /> |
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:After I wrote "The 101 errors of Stargen" I found I had the time to help with exposition on real planets.<br /> |
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http://home.comcast.net/~brons/NerdCorner/StarGen/StarGen.html |
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<br /><br /> |
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'''Some non-original-research using known values and basic algebra:'''<br /> |
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I disagree that the figure for the Earth's Solar constant at ] are accurate, <br />I've read various different quotations of the value in texts and on the net. A little accuracy wouldn't hurt:<br /> |
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R= 6.96e8 Km (Sun's radius)<br /> |
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T= 5780 °K (Sun's photosphere or Effective temperature)<br /> |
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a= 5.6704e-8 (Stefan-Boltzmann Constant)<br /> |
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d= 149597876600 meters (Earth's average distance, Mariner 10), 1 AU<br /> |
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f= flux or Insolation.<br /> |
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L= 4pi·R<sup>2</sup>aT<sup>4</sup> = 4pi·d<sup>2</sup>f<br /> |
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Therefore, f=(R<sup>2</sup>aT<sup>4</sup>) / d2<br /> |
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Then ((6.96e8 Km)2 (5.6704e-8) (5780°K)4) / (149597876600)2 = '''1369.912 W/m<sup>2</sup>'''<br /> |
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This is the average. If you factor in the Earths's eccentricity, then the range is 1325.278 W/m2 to 1416.839 W/m2<br /> |
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:If I recalculate using more accurate figures, using ((695950000)^2*(0.000000056704)*(5778^4) )/(149597876600^2), then I get<br /> '''1367.8204 W/m<sup>2</sup>''', which is only off by 0.1333% the so called satellite mesured solar constant. GabrielVelasquez (talk) 01:49, 1 January 2008 (UTC) |
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