落日上的AR 3664

落日上的AR 3664

AR 3664 on a Setting Sun
Image Credit & Copyright: Marco Meniero

Explanation: It was larger than the Earth. It was so big you could actually see it on the Sun’s surface without magnification. It contained powerful and tangled magnetic fields as well as numerous dark sunspots. Labelled AR 3664, it developed into one of the most energetic areas seen on the Sun in recent years, unleashing a series of explosions that led to a surge of energetic particles striking the Earth, which created beautiful auroras. And might continue. Although active regions on the Sun like AR 3664 can be quite dangerous, this region’s Coronal Mass Ejections have not done, as yet, much damage to Earth-orbiting satellites or Earth-surface electrical grids. Pictured, the enormous active region was captured on the setting Sun a few days ago from Civitavecchia, Rome, Italy. The composite image includes a very short exposure taken of just the Sun’s surface, but mimics what was actually visible. Finally, AR 3664 is now rotating away from the Earth, although the region may survive long enough to come around again.

Gallery: Earth Aurora from Solar Active Region 3664

Tomorrow’s picture: What is 42 – 5?

落日上的AR 3664
影像提供与版权: Marco Meniero

说明: 它比地球大。它是如此的庞大，不需要经过放大，就能直接在太阳的表面上看到它。它拥有强大且纠结的磁场，以及数量众多的黝黑太阳黑子。编号为AR 3664的它，是近年来太阳表面最活泼的活跃区之一，并释放出了一系列的爆发，把大量的高能粒子射向地球，诱发了美丽的极光。而这种爆发可能还会持续下去。虽然像AR 3664这样的活跃区可以很危险，但是来自这个活跃区的日冕物质抛射，目前尚未对绕地球运行的卫星或地球表面的电网带来太多的损害。这张摄于意大利·罗马·奇维塔韦基亚的影像，呈现了数天前在落日上的此庞然活跃区。这张组合影像，整合了一张只记录太阳表面的甚短曝光时间照片，以近似实际所见的情况。最后，AR 3664正在转入太阳的反面并远离地球，只不过，如果此活跃区存活够久，它或许会再转回来。

图片集: 来自太阳活跃区3664的全球极光

明日的图片: What is 42 – 5?