活跃太阳的日珥与暗条
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欧几里得太空望远镜的M78
图中显示了一个充满复杂的黝黑尘埃和亮紫色星云的星场。有关更多详细信息，请参阅说明。
反白星场里的暗色太阳
2022年11月6日 Dark Ball in Inverted Starfield Image Credit: Jim Lafferty Explanation: Does this strange dark ball look somehow familiar? If so, that might be because it is our Sun. In the featured image from 2012, a detailed solar view was captured originally in a very specific color of red light, then rendered in black and white, and then color inverted. Once complete, the resulting image was added to a starfield, then also color inverted. Visible in the image of the Sun are long light filaments, dark active regions, prominences peeking around the edge, and a moving carpet of hot gas. The surface of our Sun can be a busy place, in particular during Solar Maximum, the time when its surface magnetic field is wound up…
太阳表面的长蛇状暗条
2022年9月13日 A Long Snaking Filament on the Sun Image Credit & Copyright: Alan Friedman (Averted Imagination) Explanation: Earlier this month, the Sun exhibited one of the longer filaments on record. Visible as the bright curving streak around the image center, the snaking filament’s full extent was estimated to be over half of the Sun’s radius — more than 350,000 kilometers long. A filament is composed of hot gas held aloft by the Sun’s magnetic field, so that viewed from the side it would appear as a raised prominence. A different, smaller prominence is simultaneously visible at the Sun’s edge. The featured image is in false-color and color-inverted to highlight not only the filament but the Sun’s carpet chromosphere. The bright dot on the upper right…
跳出太阳的暗条
2021年11月08日 A Filament Leaps from the Sun Video Credit & Copyright: Stéphane Poirier Explanation: Why, sometimes, does part of the Sun’s atmosphere leap into space? The reason lies in changing magnetic fields that thread through the Sun’s surface. Regions of strong surface magnetism, known as active regions, are usually marked by dark sunspots. Active regions can channel charged gas along arching or sweeping magnetic fields — gas that sometimes falls back, sometimes escapes, and sometimes not only escapes but impacts our Earth. The featured one-hour time-lapse video — taken with a small telescope in France — captured an eruptive filament that appeared to leap off the Sun late last month. The filament is huge: for comparison, the size of the Earth is shown on the…