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Satellites have captured amazing views views of these craters on Earth. ESA explains. Nördlinger Ries, Ouarkziz Crater, Tenoumer Crater, Gosses Bluff, Siljan Ring, Roter Kamm, Manicouagan Crater, ...
The moon's final quarter arrives May 20, offering stunning views of half its surface lit. Discover the best ways to observe ...