Daylight Hours Explorer
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http://astro.unl.edu/classaction/animations/coordsmotion/daylighthoursexplorer.html
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EARTH GUIDE
地球ガイド ...
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6(h). Earth-Sun Geometry
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USNO Astronomical Applications Department
... portal is currently online at http://www.usno.navy.mil and is being populated. ... About AA. Information about the department and its history ...
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Windows to the Universe
User-friendly learning system on the earth and space sciences for use by the general public. From the University Corporation for Atmospheric Research.
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ScienceWorld
Comprehensive online encyclopedias of astronomy, math, physics, scientific biographies, and scientific books, with many equations and formulas.
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Rader's GEOGRAPHY 4 KIDS.COM
Geography4Kids.com! The web site that teaches physical geography and earth science basics to everyone! ... and PRIVACY POLICY for use of Geography4Kids.com. ...
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Earth & Sky : A Clear Voice for Science
The World's Top Scientists Heard 15 Million Times a Day
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The Size Of Our World
The Size Of Our World. The source for this material is unknown ...
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Earth View
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The United States Naval Observatory
The U.S. Naval Observatory is the preeminent authority in the areas of precise time and astronomy.
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