The HEXAGON KH-9 reconnaissance satellites were the largest and last U.S. intelligence satellites to return photographic film ...
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NASA Creates Most Accurate Eclipse Maps EverTraditionally, eclipse maps have been constructed from the assumption that the Moon is a perfect sphere and that all ...
Iron carried in clouds of Saharan dust blown across the Atlantic Ocean is increasingly available to tiny life forms the further it travels.
Our galaxy, the Milky Way, has around 150 globular clusters that are known to scientists. Since they are extremely old, they ...
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