2019 September 30
Orion Rising over Brazil
Image Credit & Copyright: Carlos Fairbairn
Explanation: Have you seen Orion lately? The next few months will be the best for seeing this familiar constellation as it rises continually earlier in the night. However, Orion’s stars and nebulas won’t look quite as colorful to the eye as they do in this fantastic camera image. In the featured image, Orion was captured by camera showing its full colors last month over a Brazilian copal tree from Brazil’s Central-West Region. Here the cool red giant Betelgeuse takes on a strong orange hue as the brightest star on the far left. Otherwise, Orion’s hot blue stars are numerous, with supergiant Rigel balancing Betelgeuse at the upper right, Bellatrix at the upper left, and Saiph at the lower right. Lined up in Orion’s belt (bottom to top) are Alnitak, Alnilam, and Mintaka all about 1,500 light-years away, born of the constellation’s well studied interstellar clouds. And if a “star” toward the upper right Orion’s sword looks reddish and fuzzy to you, it should. It’s the stellar nursery known as the Great Nebula of Orion.
说明: 你最近看过猎户座吗？在接下来这数个月的夜晚，猎户座将越来越早升起，所以将是观赏这个熟悉星座的最佳时机。不过在肉眼里，不要预期猎户座的群星和星云，色彩会如这幅精采相机影像这么缤纷。在这幅上个月用相机摄于巴西．中西区的猎户座全彩影像里，位在左侧最明亮的低温红巨星参宿四为亮橙色。而猎户座数量众多的炽热泛蓝恒星之中，超巨星参宿七在左上角，参宿五在左上角，参宿六在右下角。排成猎户腰带的三颗恒星之中，由下到上分别是参宿一、 参宿二及参宿三。它们诞生于猎户座广被探索的星际云之内，距离都在1,500光年左右。如果你发现位在右上角猎户配剑上的一颗”星”，看起偏红而且弥漫，这并非你眼花。它正是有猎户座大星云令名的恒星形成区。