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| | "Amateur Astronomy". Sun Eclipses |
 | | Theoretically, these situations are described as the observer being in any of three kinds of Moon's shadow, the "umbra", the "antumbra", or the "penumbra", three Latin words meaning "shadow", "anti-shadow", and "near shadow". |
 | | The situations, on the other hand, may be taken at the reverse, by considering the observer in abstract no more, but the position of the Moon instead, relative to the observer, located on the Earth this time. |
 | | Due to the respective motions of the Moon and the Earth, an eclipse, of whatever sort, is moving. |
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