银河说-每日一图171209期：白羊座中的星尘

更多天文资讯、天文摄影作品请前往银河说（GalaxSay.com）

欢迎各位天文摄影爱好者前往银河说投稿荐稿

原文请见这里

171209期：白羊座中的星尘

这张由多组星尘图像拼接而成的图片覆盖了北部天空超过8度的范围，展现的是昴宿星团西边、接近黄道星座白羊座与银河系平面的区域。其右侧是肉眼可见的恒星左更增七（Epsilon Arietis）在330光年外泛着浅浅的蓝光。从左向右跨越整个视野的则是散发着耀眼光芒的尘埃星云LBN762、LBN753与LBN743，它们约在1000光年之外，位于一团巨大分子云的边缘。通过这个距离的换算可知，该图像跨越了超过140光年的距离。这些星云以其深色内部阻挡了光学望远镜对新生恒星及原恒星的窥探。而原恒星们以分子云内嵌的致密核为中心，在自身重力的作用下不断崩塌。

译：银河说翻译组 俞天丽

Stardust in Aries

Image Credit & Copyright: Rogelio Bernal Andreo (Deep Sky Colors)

Explanation: This composition in stardust covers over 8 degrees on the northern sky. The mosaicked field of view is west of the familiar Pleiades star cluster, toward the zodiacal constellation Aries and the plane of our Milky Way Galaxy. At right in the deep skyscape is bluish Epsilon Arietis, a star visible to the naked-eye and about 330 light-years away. Reflecting starlight in the region, dusty nebulae LBN762, LBN753, and LBN743 sprawl left to right across the field, but are likely some 1,000 light-years away. At that estimated distance, the cosmic canvas is over 140 light-years across. Near the edge of a large molecular cloud, their dark interiors can hide newly formed stars and young stellar objects or protostars from prying optical telescopes. Collapsing due to self-gravity, the protostars form around dense cores embedded in the molecular cloud.

银河说 GalaxSay.com 一图栏目出品

宇宙中的烟尘。