Also known as Abell 21, this Medusa is an old planetary nebula some 1, 500 light-years away in the constellation Gemini.
也被称作阿贝尔21，水母星云是双子座中一个1500光年远的年老行星状星云。
The beautiful hourglass-shaped nebula Sharpless 2-106 shines with brilliant colors in this new image from the Gemini North telescope.
在这张双子座北座望远镜拍摄的新照片中，壮丽的沙漏状星云Sharpless 2 - 106闪烁着明艳的色彩。
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