180209期:日月全食

日月全食

这副由数字处理并合成的影像,创造性地将两次著名的全食天象合二为一。图片左侧为1月31日的月全食,而右侧为2017年8月21日的日全食。在这背靠背发生的两次全食过程中,月球都处于接近食甚阶段。月全食时,月球受到地球黑暗泛红阴影的照耀。而在日全食过程中,月亮的轮廓遮挡了太阳明亮的日盘。由于地照的原因,原本黑暗的月球表面变得依稀可见。除此之外,这幅以月盘对齐的影像中,我们不仅可以看到夜空中围绕着食月的暗星,而且食日周围的日珥和冕流更是无比的清晰。8月21日美国日全食,月球阴影路径内的地方的全食阶段大约持续了2分钟。不过在我们地球的夜面,1月31日超级蓝血月的全食阶段持续了一个多小时。

翻译:银河说翻译组  潘Hellen

审核:银河说顾问组  吴宇帆

Total Solar Lunar Eclipse

Composite Image Credit & Copyright: Wang Letian,Zhang Jiajie

Explanation: This digitally processed and composited picture creatively compares two famous eclipses in one; the total lunar eclipse (left) of January 31, and the total solar eclipse of August 21, 2017. The Moon appears near mid-totality in both the back-to-back total eclipses. In the lunar eclipse, its surface remains faintly illuminated in Earth’s dark reddened shadow. But in the solar eclipse the Moon is in silhouette against the Sun’s bright disk, where the otherwise dark lunar surface is just visible due to earthshine. Also seen in the lunar-aligned image pair are faint stars in the night sky surrounding the eclipsed Moon. Stunning details of prominences and coronal streamers surround the eclipsed Sun. The total phase of the Great American Eclipse of August 21 lasted about 2 minutes or less for locations along the Moon’s shadow path. From planet Earth’s night side, totality for the Super Blue Blood Moon of January 31 lasted well over an hour.

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