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美国国家航空航天局NASA每日一图-2017年8月4日(美国宇航局的太阳能观测站观看太阳黑子 )

NASA's Solar Dynamics Observatory Watches a Sunspot

On July 5, 2017, NASA’s Solar Dynamics Observatory watched an active region — an area of intense and complex magnetic fields — rotate into view on the Sun. The satellite continued to track the region as it grew and eventually rotated across the Sun and out of view on July 17.

With their complex magnetic fields, sunspots are often the source of interesting solar activity. During its 13-day trip across the face of the Sun, the active region — dubbed AR12665 — put on a show for NASA’s Sun-watching satellites, producing several solar flares, a coronal mass ejection and a solar energetic particle event. Watch the video below to learn how NASA’s satellites tracked the sunspot over the course of these two weeks.

This image shows a blended view of the sunspot in visible and extreme ultraviolet light, revealing bright coils arcing over the active region — particles spiraling along magnetic field lines.

Additional images and video: Two Weeks in the Life of a Sunspot

Image Credit: NASA’s Goddard Space Flight Center/SDO

Last Updated: Aug. 5, 2017
Editor: Sarah Loff


2017年7月5日,美国航空航天局的太阳能观测站观看了一个活跃的地区 - 一个强烈而复杂的磁场区域,转向了太阳的视野。卫星继续追踪该地区,并于七月十七日在太阳升空后转向视线。


该图像显示在可见光和极紫外光下的太阳黑子的混合视图,显示在有源区域上的明亮的线圈 - 沿着磁场线旋转的颗粒。


图片来源:NASA的戈达德太空飞行中心/ SDO