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http://www.physicalgeography.net/fundamentals/6h.html
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earth
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sun
seasons
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rotation
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To understand why we have seasons, we need to look at the relations ... The sun's rays are pretty close to parallel to each other when they reach the Earth, ...
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seasons
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地球ガイド ...
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daylight
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time
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interactive
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seasons
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Cooperative effort between the European Space Agency and NASA to study the Sun, from its deep core to the outer corona, and the solar wind.
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nasa
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The Goce satellite returns a remarkable high-definition view of how gravity varies across the Earth.
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gravity
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map
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Learn all about the earth sun and moon, fly your space rocket get past the asteroids and begin learning! then take a short test and print out your certificate!
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moon
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interactive
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Current research news plus daily forecasts of solar flares and geo-magnetic storms from NASA.
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news
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auroras
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Explaining the mathematics behind the attempt to track the visible path the sun takes throughout the year.
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sun
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analemma
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navigation
funny
osx
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Righting wrong ideas. Addresses astronomical and scientific misconceptions spread by movies, TV, the news, and popular beliefs.
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blog
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skeptic
blogs
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skepticism
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Allows you to customize a wide variety of parameters.
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