It turns out that in the eighth year of his stay in Chongzhen, he actually built a telescope. Although it was the simplest combination of a single concave and a single convex lens with a viewing distance of only one thousand meters, it was already the prototype of a telescope. As for the source of the glass lens, he purchased it from a businessman in Franji....
本网站所有内容均收录于互联网相关站点，本站不提供影片资源储存也不参与录制与上传，若本站收录内容侵犯了您相关权益，请给我们留言，我们将及时进行处理。
