171129期:M42:猎户座大星云

M42:猎户座大星云

如邻近的猎户座星云一般激发人们想象力的天文景观是极少见的。在巨大的星际分子云边缘,该星云的炽热云气包裹着许多年轻恒星。从特写中我们可以看到许多丝状结构,这是高速移动的物质与低速的气体相遇时产生的冲击波。这团肉眼可见的猎户座大星云,跨度约为40光年,距离我们约1500光年,位于著名的猎户座腰带三星左下方,在银河系中与太阳位于同一道旋臂上。上面这张照片拍摄于上个月,是通过两小时长曝光拍摄而得的猎户座星云的三色影像。包括马头星云在内的整个猎户座星云复合体都将在未来的十万年间逐渐消散。

译:银河说翻译组 俞天丽

                                                M42: The Great Orion Nebula
                                   Image Credit & Copyright: Francesco Battistella 

Explanation: Few astronomical sights excite the imagination like the nearby stellar nursery known as the Orion Nebula. The Nebula‘s glowing gas surrounds hot young stars at the edge of an immense interstellar molecular cloud. Many of the filamentary structures visible in the featured image are actually shock waves – fronts where fast moving material encounters slow moving gas. The Orion Nebula spans about 40 light years and is located about 1500 light years away in the same spiral arm of our Galaxy as the Sun. The Great Nebula in Orion can be found with the unaided eye just below and to the left of the easily identifiable belt of three stars in the popular constellation Orion. The featured image, taken last month, shows a two-hour exposure of the nebula in three colors. The whole Orion Nebula cloud complex, which includes the Horsehead Nebula, will slowly disperse over the next 100,000 years.

发表评论

电子邮件地址不会被公开。 必填项已用*标注