https://blog.wongcw.com/2021/12/05/%e5%93%88%e5%8b%83%e5%a4%aa%e7%a9%ba%e6%9c%9b%e9%81%a0%e9%8f%a1%e5%b0%8d%e8%a1%8c%e6%98%9f%e7%8b%80%e6%98%9f%e9%9b%b2%e7%9a%84%e8%a7%80%e5%af%9f%e6%8f%ad%e7%a4%ba%e4%ba%86%e5%85%b6%e8%a4%87%e9%9b%9c/
哈勃太空望遠鏡對行星狀星雲的觀察揭示了其複雜的結構