天鹅座方向的天空

2020年8月26日

Cygnus Skyscape
Image Credit & Copyright: Alistair Symon

Explanation: In brush strokes of interstellar dust and glowing hydrogen gas, this beautiful skyscape is painted across the plane of our Milky Way Galaxy near the northern end of the Great Rift and the constellation Cygnus the Swan. Composed using 22 different images and over 180 hours of image data, the widefield mosaic spans an impressive 24 degrees across the sky. Alpha star of Cygnus, bright, hot, supergiant Deneb lies near top center. Crowded with stars and luminous gas clouds Cygnus is also home to the dark, obscuring Northern Coal Sack Nebula, extending from Deneb toward the center of the view. The reddish glow of star forming regions NGC 7000 and IC 5070, the North America Nebula and Pelican Nebulas, are just left of Deneb. The Veil Nebula is a standout below and left of center. A supernova remnant, the Veil is some 1,400 light years away, but many other nebulae and star clusters are identifiable throughout the cosmic scene. Of course, Deneb itself is also known to northern hemisphere skygazers for its place in two asterisms — marking the top of the Northern Cross and a vertex of the Summer Triangle.

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Tomorrow’s picture: peculiar galaxies

天鹅座方向的天空
影像提供与版权: Alistair Symon

说明: 这幅以星际尘埃和氢气辉光为笔触的美丽星空影像，呈现我们银河系盘面大裂缝（大暗隙）北端附近及天鹅座的景观。由22张总曝光时间180多小时的影像数据，组合而成的这幅大视野拼接影像，涵盖天空24度的区域。其中，明亮炽热的超巨星天鹅座α星–天津四，位在影像的顶缘中间附近。而繁星及明亮气体云群集的天鹅座，也是从天津四伸展到视野中心，名为北煤袋星云的黝黑云气之家园。在天津四的左侧，有泛红的恒星形成区The reddish glow of star forming regions NGC 7000 and IC 5070, the 北美洲星云（NGC 7000）和鹈鹕星云（IC 5070）。影像中左下方最突出的天体，则是面纱星云，一个距离约1,400光年远的的超新星遗迹。除此之外，在这片宇宙天区里，还散布着许多可辨识的星云和星团。对北半球的观星者来说，天津四是构成二个著名星官的重要天体，它分别是北十字的顶点和夏三角的端点。

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明日的图片: peculiar galaxies