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Ray system of Tycho lunar crater, 1900. The Tycho crater (upper right) is 86 kilometres across, with the rays formed by ejecta from this major impact event that took place 108 million years ago. ROYAL ASTRONOMICAL SOCIETY/SCIENCE PHOTO LIBRARY
Ray system - Wikipedia
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Full Moon Is Tycho Time - Sky & Telescope - Sky & Telescope
A guide to the Moon's Tycho Crater - BBC Sky at Night Magazine
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Tycho crater hi-res stock photography and images - Alamy
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Tycho crater hi-res stock photography and images - Alamy
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