Thursday, August 27, 2020

Kuiper belt

https://solarsystem.nasa.gov/news/792/10-things-to-know-about-the-kuiper-belt/

https://zh.wikipedia.org/wiki/%E6%9F%AF%E4%BC%8A%E4%BC%AF%E5%B8%A6

https://www.youtube.com/watch?v=MCC00b3RsPk