jan 1, 1659 - Saturn

Description:

(1659) Huygens explains the changing appearances of Saturn as due to its being surrounded by a flat thin ring of matter.

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=imgres&cd=&cad=rja&uact=8&ved=2ahUKEwiFqdWwz4TfAhXOmq0KHaa2B20QjRx6BAgBEAU&url=https%3A%2F%2Fsolarsystem.nasa.gov%2Fplanets%2Fsaturn%2Foverview%2F&psig=AOvVaw2sRwIPPtdz5LrQ3ojYqW3F&ust=1543959472369906