环状星云周围的环
(原标题: Rings Around the Ring Nebula)
2024-04-28
浏览次数: 15
环状星云（M57）比通过小型望远镜看到的要复杂得多。很容易看到的中心环直径约为一光年，但这张非常深的曝光——由三个不同的大型望远镜的数据共同努力得来的——探索了从星云中心恒星向远处延伸的发光气体的环状细丝。这张合成图像包括氢发出的红光、可见光和红外光。环状星云是一个细长的行星状星云，当一颗类太阳的恒星进化出外层大气，变成一颗白矮星时，就会形成一种星云。环状星云距离音乐星座天琴座约2500光年。你的天空惊喜：APOD在你的生日上展示了什么照片？(1995后)
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The Ring Nebula (M57) is more complicated than it appears through a small telescope. The easily visible central ring is about one light-year across, but this remarkably deep exposure - a collaborative effort combining data from three different large telescopes - explores the looping filaments of glowing gas extending much farther from the nebula's central star. This composite image includes red light emitted by hydrogen as well as visible and infrared light. The Ring Nebula is an elongated planetary nebula, a type of nebula created when a Sun-like star evolves to throw off its outer atmosphere and become a white dwarf star. The Ring Nebula is about 2,500 light-years away toward the musical constellation Lyra. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
© Robert Gendler