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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, ...
http://daphne.palomar.edu/jthorngren/tutorial.htm
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Current research news plus daily forecasts of solar flares and geo-magnetic storms from NASA.
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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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Allows you to customize a wide variety of parameters.
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Information about near-earth object studies including asteroid orbits, images, updates, potentially hazardous asteroids (PHA), and more.
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Offering original news and educational features about space, science, and space technology.
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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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Presents space news from around the Internet. ... universetoday.com. Submit search form. Email newsletter. Daily Edition. Weekly Edition ...
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Official site for the The International Year of Astronomy 2009 (IYA2009), the global celebration of astronomy and its contributions to society and culture.
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Interactive online sky map ... WIKISKY.ORG. Stars That Shine Forever. Supernova: Chich. Nova: Pasquale Nanula. HE IT FR ZH RU SV PT SR PL DE HU ES JA EN KO TR EL ...
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