带着长梗的玫瑰星云

2021年02月14日

Long Stem Rosette Nebula
Image Credit & Copyright: Adam Block & Tim Puckett

Explanation: Would the Rosette Nebula by any other name look as sweet? The bland New General Catalog designation of NGC 2237 doesn’t appear to diminish the appearance of this flowery emission nebula, at the top of the image, atop a long stem of glowing hydrogen gas. Inside the nebula lies an open cluster of bright young stars designated NGC 2244. These stars formed about four million years ago from the nebular material and their stellar winds are clearing a hole in the nebula’s center, insulated by a layer of dust and hot gas. Ultraviolet light from the hot cluster stars causes the surrounding nebula to glow. The Rosette Nebula spans about 100 light-years across, lies about 5000 light-years away, and can be seen with a small telescope towards the constellation of the Unicorn (Monoceros).

Jump around the Universe: Random APOD Generator

Tomorrow’s picture: seven minutes of terror

带着长梗的玫瑰星云
影像提供与版权: Adam Block & Tim Puckett

说明: 玫瑰星云如以其他名字来命名，看起来是否依然甜美？以平凡无奇新总表编号NGC 2237来称呼它，看来并未减损此影像顶端、以长长辉光氢气为梗的这团花样发射星云之风采。此星云内藏着一群由明亮年轻恒星组成，名为NGC 2244的疏散星团。这些恒星大约是在4百万年前形成于星云物质里，它们的恒星风在星云的中心吹出一个空穴，内衬着层状尘埃与炙热的气体。而源自炽热星群的紫外光，则激发周围的星云发出辉光。位在麒麟座方向的玫瑰星云，宽度约为100光年，离地球有5000多光年远，用小型望远镜即可见。

环球漫游: 随机天文·每日一图生成器

明日的图片: seven minutes of terror