小暗星雲
Small Dark Nebula

來源:Peter Bresseler|發表日期:2025-08-01
在這個望遠鏡特寫鏡頭的中心附近,一個又小又黑的星雲看起來孤立無援。不過,這個楔形宇宙雲團位於太空中一個相對擁擠的區域。這個區域被稱為 M 16 或鷹星雲,距離地球約 7000 光年,充滿了熾熱的氣體和一個由年輕恆星組成的星團。哈勃拍攝的鷹狀星雲的標誌性影像包括著名的恆星形成的 "創世之柱",它是由星際氣體和塵埃組成的高聳結構,長 4 到 5 光年。但是這個小的暗星雲被一些人稱為 "Bok 球",只有幾分之一光年寬。在 M 16 漫反射光的廣闊背景下,Bok 球狀顯得格外突兀。博克球散佈在發射星雲和星團中,是由冷分子氣體和遮蔽塵埃組成的小型星際雲團,在其緻密坍縮的核心中也會形成恆星。
原文:A small, dark, nebula looks isolated near the center of this telescopic close-up. The wedge-shaped cosmic cloudlet lies within a relatively crowded region of space though. About 7,000 light-years distant and filled with glowing gas and an embedded cluster of young stars, the region is known as M16 or the Eagle Nebula. Hubble's iconic images of the Eagle Nebula include the famous star-forming Pillars of Creation, towering structures of interstellar gas and dust 4 to 5 light-years long. But this small dark nebula, known to some as a Bok globule, is a fraction of a light-year across. The Bok globule stands out in silhouette against the expansive background of M16's diffuse glow. Found scattered within emission nebulae and star clusters, Bok globules are small interstellar clouds of cold molecular gas and obscuring dust that also form stars within their dense, collapsing cores.
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