Copyright:Adam Block
原文:
The 1970s are sometimes ignored by astronomers, like this beautiful grouping of reflection nebulae in Orion – NGC 1977, NGC 1975, and NGC 1973 – usually overlooked in favor of the substantial glow from the nearby stellar nursery better known as the Orion Nebula. Found along Orion’s sword just north of the bright Orion Nebula complex, these reflection nebulae are also associated with Orion’s giant molecular cloud about 1,500 light-years away, but are dominated by the characteristic blue color of interstellar dust reflecting light from hot young stars. In this sharp color image a portion of the Orion Nebula appears along the bottom border with the cluster of reflection nebulae at picture center. NGC 1977 stretches across the field just below center, separated from NGC 1973 (above right) and NGC 1975 (above left) by dark regions laced with faint red emission from hydrogen atoms. Taken together, the dark regions suggest to many the shape of a running man.
中文翻譯:
在1970年代，像這組美麗的反射星雲——NGC 1977、NGC 1975及NGC 1973，有時會被天文學家忽略，因為通常會更專注於附近雄偉的恆星誕生區，更為人所熟知的獵戶座星雲。在獵戶座的劍上，這些反射星雲位於明亮的獵戶星雲複合體正北方，與獵戶巨分子雲有關，距離約1,500光年，但卻以其特有的藍色著稱，這是由於星際塵埃反射了熱的年輕恆星的光芒。在這張清晰的彩色圖像中，獵戶星雲的部分出現在底部邊緣，而反射星雲群則位於圖像的中央。NGC 1977橫跨了畫面，位於中央下方，與NGC 1973（右上方）和NGC 1975（左上方）之間則有著暗區域，這些暗區域中融入了微弱的紅色氫原子發射光。在一起看，這些暗區域讓許多人聯想到一個奔跑中的人形狀。
#獵戶座 #反射星雲 #NGC1977 #NGC1975 #NGC1973 #恆星誕生 #星際塵埃 #天文學 #藍色星雲 #宇宙探險 #天文圖像 #星空探索
來源:NASA每日圖片
