=玫瑰星云=

发布日期: 2020-08-12 09:40:25 阅读量:879

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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 the this flowery emission nebula. 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 Monoceros.
说明:
玫瑰星云若改为其他名字,是否看 来同样甜美? 在新总表中所命名的 NGC 2237 ,看来并没有减损这个花似的发射星云之外观。 于星云中躺着一群由明亮年轻恆星组成的疏散星团,名为NGC 2244 。 这些星星是在约四万年前从星云原料中形成的,而他们的恆星风在星云的中心吹出一个洞, 被一层的尘埃与炙热气体所隔离。 来自炎热的星群之紫外线,使得周围的星云发光。 玫瑰星云的宽度约100光年,离地球约5000光年远,用小型望远镜朝着 麒麟 座 的方向看便能看到。
资料来源: Scientific American
Department of Physics, NCKU
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