On This Day in Space! Oct. 25, 1671: Giovanni Cassini Discovers Saturn's Iapetus
- Thu 25 Oct 2018 11:14:AM
On Oct. 25, 1671, the Italian astronomer Giovanni Cassini discovered a new moon at Saturn! Iapetus was the second moon anyone had ever found orbiting Saturn. See how it happened in our On This Day in Space video series!
Source: On This Day in Space! Oct. 25, 1671: Giovanni Cassini Discovers Saturn's Iapetus
Source: On This Day in Space! Oct. 25, 1671: Giovanni Cassini Discovers Saturn's Iapetus