肉眼几乎可见的猎户座

2024年1月16日

The Orion You Can Almost See
Image Credit & Copyright: Michele Guzzini

Explanation: Do you recognize this constellation? Although it is one of the most recognizable star groupings on the sky, this is a more full Orion than you can see — an Orion only revealed with long exposure digital camera imaging and post – processing. Here the cool red giant Betelgeuse takes on a strong orange tint as the brightest star on the upper left. Orion‘s hot blue stars are numerous, with supergiant Rigel balancing Betelgeuse on the lower right, and Bellatrix at the upper right. Lined up in Orion’s belt are three stars all about 1,500 light-years away, born from the constellation’s well-studied interstellar clouds. Just below Orion’s belt is a bright but fuzzy patch that might also look familiar — the stellar nursery known as Orion’s Nebula. Finally, just barely visible to the unaided eye but quite striking here is Barnard’s Loop — a huge gaseous emission nebula surrounding Orion’s Belt and Nebula discovered over 100 years ago by the pioneering Orion photographer E. E. Barnard.

Tomorrow’s picture: the sea of serenity

肉眼几乎可见的猎户座
影像提供与版权: Michele Guzzini

说明: 你认得这个星座吗？尽管它是天空中最容易辨认的星群之一，但这种与肉眼所见比较更加完整的猎户座，只有透过长曝光数位相机成像及电脑后制处理才得以显现。在此影像里，带着深橙色调的低温红巨星参宿四，是位于左上角的最明亮恒星。猎户座的炽热泛蓝恒星数量众多，其中，右下角的超巨星参宿七，亮度足以和左上角的参宿四相抗衡，而右上角的亮星则是参宿五。距离我们全约为1,500光年远的猎户腰带三星，皆诞生于猎户座备受研究的星际云里。猎户腰带下方有一片明亮但模糊的光斑，它看来或许也有点眼熟，这是因为它是名为猎户座大星云的恒星孕育室。最后是肉眼勉强可见但相当引人注目的巴纳德环，这团环拱在猎户腰带和猎户座大星云周围的庞大发射星云，是由猎户座摄影先锋巴纳德发现于100多年前。（Betelgeuse 参宿四; Rigel 参宿七; Bellatrix 参宿五; Barnard’s Loop 巴纳德环; Hatysa 伐三; Alnitak 参宿一; Alnilam 参宿二; Mintaka 参宿三; Saiph 参宿六; Cursa 玉井三-波江座）