天蝎座方向的精采景观
影像来源与版权:Stéphane Guisard, TWAN

说明:如果肉眼所见的天蝎座有这么精采,人们会对它印象会深刻不少。在北天著名但鲜少受到赏识的黄道面天蝎座之内,通常只能见到寥寥数颗星。要得到上面这种精采的影像,需要有好一部好相机、数片彩色滤镜和一个数位影像处理软件。为了要带出细节,这幅主题影像不但整合数个色彩波段进行的长曝光数据,还包含了氢在某一特定红光的辐射。这幅所制作出的影像,带着数个令人神移的特色,包括左侧垂直贯过的部分银河系盘面,上头有成团的亮星和颀长的丝缕状黝黑尘埃。在影像中心处,有从银河斜伸而出,名为暗河的黝黑尘埃带。这道“河流”截止于构成天蝎头和爪的数颗亮星,包括明亮的心宿二。在心宿二的右上方,可见到更为明亮的木星。此外在影像各处,还可见到难以数计的泛红发射星云和泛蓝反射星云。在年中之时,天蝎座是南天日落后很醒目的星座。
翻译:“每日一天文图”成大物理分站

A Scorpius Sky Spectacular
Image Credit & Copyright: Stéphane Guisard, TWAN

Explanation: If Scorpius looked this good to the unaided eye, humans might remember it better. Scorpius more typically appears as a few bright stars in a well-known but rarely pointed out zodiacal constellation. To get a spectacular image like this, though, one needs a good camera, color filters, and a digital image processor. To bring out detail, the featured image not only involved long duration exposures taken in several colors, but one exposure in a very specific red color emitted by hydrogen. The resulting image shows many breathtaking features. Vertically across the image left is part of the plane of our Milky Way Galaxy. Visible there are vast clouds of bright stars and long filaments of dark dust. Jutting out diagonally from the Milky Way in the image center are dark dust bands known as the Dark River. This river connects to several bright stars on the right that are part of Scorpius’ head and claws, and include the bright star Antares. Above and right of Antares is an even brighter planet: Jupiter. Numerous red emission nebulas and blue reflection nebulas are visible throughout the image. Scorpius appears prominently in southern skies after sunset during the middle of the year.
Astronomy Picture of the Day 04/07/2019