AR2835：光球中的岛屿
(原标题: AR2835: Islands in the Photosphere)
2021-07-02
浏览次数: 34
太阳黑子是太阳光球层（太阳明亮的表面）中行星大小的黑暗岛屿，淹没在白炽等离子体的海洋中，锚定在强磁场中。在太阳活动区发现的太阳黑子看起来很暗，只是因为它们的温度略低，温度约为4000开尔文，而周围太阳表面的温度为6000开尔文。这些太阳黑子位于活跃区域AR2835。AR2835是目前穿过太阳的最大的活跃区域，这张7月1日拍摄的锐利望远镜特写镜头拍摄的AR2835的视野跨度约为15万公里，相当于地球直径的10倍多。由于具有强大的磁场，太阳活动区域经常会产生太阳耀斑和日冕物质抛射，这些风暴会影响地球附近的空间天气。
查看原文解释
Awash in a sea of incandescent plasma and anchored in strong magnetic fields, sunspots are planet-sized dark islands in the solar photosphere, the bright surface of the Sun. Found in solar active regions, sunspots look dark only because they are slightly cooler though, with temperatures of about 4,000 kelvins compared to 6,000 kelvins for the surrounding solar surface. These sunspots lie in active region AR2835. The largest active region now crossing the Sun, AR2835 is captured in this sharp telescopic close-up from July 1 in a field of view that spans about 150,000 kilometers or over ten Earth diameters. With powerful magnetic fields, solar active regions are often responsible for solar flares and coronal mass ejections, storms which affect space weather near planet Earth.
© Michael Teoh