火箭羽影指向月球
(原标题: Rocket Plume Shadow Points to the Moon)
2024-02-11
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为什么火箭发射羽流的阴影会指向月球？2001年初，在亚特兰蒂斯号航天飞机的发射过程中，太阳、地球、月球和火箭都正确地对准了这一上镜的巧合。首先，航天飞机的羽流要投下长长的影子，一天中的时间必须在日出或日落附近。只有这样，影子才会最长，一直延伸到地平线。最后，在满月期间，太阳和月亮位于天空的两端。例如，在日落之后，太阳略低于地平线，而在另一个方向上，月亮略高于地平线。因此，当亚特兰蒂斯号在日落之后发射升空时，它的影子从太阳投射到相反的地平线上，也就是满月所在的地方。几乎超空间：随机APOD生成器
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Why would the shadow of a rocket's launch plume point toward the Moon? In early 2001 during a launch of the space shuttle Atlantis, the Sun, Earth, Moon, and rocket were all properly aligned for this photogenic coincidence. First, for the space shuttle's plume to cast a long shadow, the time of day must be either near sunrise or sunset. Only then will the shadow be its longest and extend all the way to the horizon. Finally, during a Full Moon, the Sun and Moon are on opposite sides of the sky. Just after sunset, for example, the Sun is slightly below the horizon, and, in the other direction, the Moon is slightly above the horizon. Therefore, as Atlantis blasted off, just after sunset, its shadow projected away from the Sun toward the opposite horizon, where the Full Moon happened to be. Almost Hyperspace: Random APOD Generator