On Oct. 13, 1773, a French astronomer named Charles Messier discovered the “Whirlpool Galaxy,” also known as Messier 51, or M51. See how it happened in our On This Day in Space video series!
On This Day in Space! Oct. 13, 1773: Charles Messier Discovers the ‘Whirlpool Galaxy’
by Space.com | Oct 13, 2018 | Uncategorized |