尘埃和西部面纱星云
(原标题: Dust and the Western Veil Nebula)
2023-10-18
浏览次数: 14
它太大了，很容易错过。整个面纱星云的直径是满月的六倍，但它太暗了，你需要用双筒望远镜才能看到。这个星云形成于大约15000年前，当时天鹅座的一颗恒星爆炸了。这次壮观的爆炸在一周内看起来甚至比金星还要亮，但没有已知的记录。图为仍在膨胀的气体云的西部边缘。值得注意的气体灯丝包括左上角靠近明亮前景恒星天鹅座52的女巫扫帚星云，以及在图像中间斜向上的弗莱明三角缕（以前称为皮克林三角）。很少被拍摄到的东西——但在许多色带的长时间曝光中可以看到——是反射的棕色尘埃，它垂直地在图像左侧运行，可能是在大质量恒星的凉爽大气中产生的尘埃。
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It's so big it is easy to miss. The entire Veil Nebula spans six times the diameter of the full moon, but is so dim you need binoculars to see it. The nebula was created about 15,000 years ago when a star in the constellation of the Swan (Cygnus) exploded. The spectacular explosion would have appeared brighter than even Venus for a week - but there is no known record of it. Pictured is the western edge of the still-expanding gas cloud. Notable gas filaments include the Witch's Broom Nebula on the upper left near the bright foreground star 52 Cygni, and Fleming's Triangular Wisp (formerly known as Pickering's Triangle) running diagonally up the image middle. What is rarely imaged -- but seen in the featured long exposure across many color bands -- is the reflecting brown dust that runs vertically up the image left, dust likely created in the cool atmospheres of massive stars.
© Jiang Wu