Visual Observing Manual - http://www.aavso.org/visual-observing-manual-chinese

流星雨觀賞及拍攝提示 - http://forum.hkas.org.hk/viewthread.php?tid=7180 http://zh.wikipedia.org/wiki/%E6%B5%81%E6%98%9F%E9%9B%A8

5 famous constellations that (almost) anyone can find - https://www.nationalgeographic.com/science/article/constellations-stars-gazing-sky-night-cosmic-landmarks
