一朵宇宙玫瑰:麒麟座内的玫瑰星云
影像来源与版权:Jean Dean

说明:玫瑰星云(NGC 2237),并不是唯一让人联想到花朵形象的宇宙气体和尘埃云,但它是最出名的。距离我们大约5000光年远、在麒麟座巨大分子云的边缘,这朵宇宙玫瑰的花瓣实际上是个恒星孕育场。其可爱而又对称的形状是由位于中央炽热而又年轻的O型恒星发出的恒星风和辐射侵蚀而成。高能星团内的恒星被编录为NGC 2244,年龄只有几百万年,而玫瑰星云中央的空洞直径大约有50光年。用小望远镜朝着麒麟座方向就能找到这个星云。这张展现自然色玫瑰星云的望远镜影像是利用宽带和窄带滤波片拍摄得到,因为有时玫瑰并非红色。
翻译:北京天文馆

A Cosmic Rose: The Rosette Nebula in Monoceros
Image Credit & Copyright: Jean Dean

Explanation: The Rosette Nebula, NGC 2237, is not the only cosmic cloud of gas and dust to evoke the imagery of flowers, but it is the most famous. At the edge of a large molecular cloud in Monoceros some 5,000 light years away, the petals of this cosmic rose are actually a stellar nursery. The lovely, symmetric shape is sculpted by the winds and radiation from its central cluster of hot young, O-type stars. Stars in the energetic cluster, cataloged as NGC 2244, are only a few million years young, while the central cavity in the Rosette Nebula, is about 50 light-years in diameter. The nebula can be seen with a small telescope toward the constellation of Monoceros, the Unicorn. This natural appearing telescopic portrait of the Rosette Nebula was made using broadband and narrowband filters, because sometimes roses aren’t red.
Astronomy Picture of the Day 04/12/2019