开心果星云
(原标题: The Pistachio Nebula)
2023-08-22
浏览次数: 14
这个星云以前从未被发现过。新发现的星云通常角度很小，由专业人士用大型望远镜发现。相比之下，开心果星云是由热心的业余爱好者发现的，虽然暗淡，但几乎和满月一样大。在现代，业余爱好者即使用小型望远镜也能在比大多数专业望远镜所能看到的大得多的天空区域上长时间曝光。因此，他们既可以发现已知物体周围以前未知的扩展发射区域，也可以发现完全未知的物体，如星云。开心果星云的氧发射（蓝色）和氢发射（红色）。热中央恒星的性质目前尚不清楚，如果它被证明是一颗白矮星，那么这个星云可能被标记为行星状星云。这张特色照片是6月初在纳米比亚黑暗的天空下拍摄的70多个小时的合成照片。
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This nebula had never been noted before. Newly discovered nebulas are usually angularly small and found by professionals using large telescopes. In contrast, the Pistachio Nebula was discovered by dedicated amateurs and, although faint, is nearly the size of the full Moon. In modern times, amateurs with even small telescopes can create long exposures over sky areas much larger than most professional telescopes can see. They can therefore discover both previously unknown areas of extended emission around known objects, as well as entirely unknown objects, like nebulas. The pictured Pistachio Nebula is shown in oxygen emission (blue) and hydrogen emission (red). The nature of the hot central star is currently unknown, and the nebula might be labeled a planetary nebula if it turns out to be a white dwarf star. The featured image is a composite of over 70 hours of exposure taken in early June under the dark skies of Namibia.
© Bray Falls & Chester Hall-Fernandez