太陽活動令科學家迷惑不解 - http://cn.wsj.com/big5/20131112/bus093431.asp?source=rss

Earth’s final total solar eclipse will happen in less than a billion years - https://medium.com/starts-with-a-bang/earths-final-total-solar-eclipse-will-happen-in-less-than-a-billion-years-5f9bda31b6d0

What is the fall equinox? Here's what you need to know. - https://www.nationalgeographic.com/news/2015/09/150922-equinox-autumn-seasons-sun-moon-space-science

Why do days get shorter and darker with autumn? - https://www.zmescience.com/other/feature-post/why-do-days-get-shorter-and-darker-with-autumn/

太陽有多熱？ - https://www.zmescience.com/science/how-hot-is-the-sun-feature/