Shapley 1：环状行星状星云
(原标题: Shapley 1: An Annular Planetary Nebula)
2026-03-04
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现在看着你的不是宇宙之眼，而是Shapley 1号，一个美丽对称的行星状星云。Shapley 1，也被称为细环星云或PLN 329+2.1，是南方天空中木匠广场星座（诺玛）的明珠。这个星云是一颗质量接近太阳的恒星耗尽燃料并脱落其外层的结果。这些被排出的层发出的发光氧气构成了圆形的光晕。明亮的中心点实际上是一对双星：一颗白矮星，外层被驱逐到太空后剩下的恒星核心，以及另一颗恒星，每2.9天绕彼此运行一次。Shapley 1的环状形状是由于我们对系统的自上而下的看法，并提供了对中心恒星对行星状星云结构的影响的见解。
查看原文解释
What’s looking back at you isn’t a cosmic eye, but Shapley 1, a beautifully symmetric planetary nebula. Shapley 1, also known as the Fine Ring Nebula or PLN 329+2.1, bejewels the southern sky constellation of the Carpenter's Square (Norma). The nebula is the result of a star near the mass of our Sun running out of fuel and shedding its outer layers. Glowing oxygen from those expelled layers makes up the circular halo. The bright central point is actually a binary: a white dwarf, the remaining stellar core after the outer layers are expelled into space, and another star, orbiting each other every 2.9 days. Shapley 1’s annular shape is due to our top-down view of the system and provides insight into the influence of central stars on planetary nebula structures.
© Peter Bresseler; Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)