Maps of universe
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Some large moons of the Solar System compared with the terrestrial planets Earth's Moon - Surface features Earth's Moon - Formation of a crater Earth's Moon - Interior structure Earth's Moon - Formation hypothesis
Question: Why is the crescent moon at sunset sometimes tilted like a backwards "C", and sometimes flat on its back like a "U"? Introduction: This is a tough question, and one that even the experts make mistakes on. First, the pointed parts of the crescent are sometimes referred to as the moon's "horns".