广袤的日冕
影像来源与版权:P. Horálek, Z. Hoder, M. Druckmüller, P. Aniol, S. Habbal / Solar Wind Sherpas

说明:大多数照片都没有充分地描绘出太阳日冕的壮丽。在日全食期间亲眼看到的日冕是无与伦比的。人眼能够适应普通照相机通常无法看到的日冕特征和规模。无论如何,欢迎来到数字时代。这幅精彩的中央影像数码合成了短曝光和长曝光照片,经过处理突出了在2017年8月日全食期间日冕的黯淡和外延特征。清晰可见的是太阳日冕中不断变化的炽热气体和磁场混合物之复杂层状结构和炽热焦散线。环状日珥在太阳边缘呈现出亮粉色。由于受到整个地球白昼面所反射阳光的照耀,新月夜面的黯淡结构也清晰可见。在全食阶段前后几秒钟拍摄到了名为贝利珠或钻石环的背景太阳惊鸿一瞥。明天,南美洲部分地区将会看到一次新的日全食。
翻译:北京天文馆

The Big Corona
Image Credit & Copyright: P. Horálek, Z. Hoder, M. Druckmüller, P. Aniol, S. Habbal / Solar Wind Sherpas

Explanation: Most photographs don’t adequately portray the magnificence of the Sun’s corona. Seeing the corona first-hand during a total solar eclipse is unparalleled. The human eye can adapt to see coronal features and extent that average cameras usually cannot. Welcome, however, to the digital age. The featured central image digitally combined short and long exposures that were processed to highlight faint and extended features in the corona of the total solar eclipse that occurred in August of 2017. Clearly visible are intricate layers and glowing caustics of an ever changing mixture of hot gas and magnetic fields in the Sun’s corona. Looping prominences appear bright pink just past the Sun’s limb. Faint details on the night side of the New Moon can even be made out, illuminated by sunlight reflected from the dayside of the Full Earth. Images taken seconds before and after the total eclipse show glimpses of the background Sun known as Baily’s Beads and Diamond Ring. Tomorrow, a new total solar eclipse will be visible from parts of South America.
Astronomy Picture of the Day 07/01/2019