Galileo Saw Neptune in 1612—But Didn’t Know He Had Discovered a Planet
Galileo Saw Neptune in 1612—But Didn’t Know He Had Discovered a Planet | Cosmic A2Z How one of history’s greatest astronomers unknowingly observed Neptune more than 200 years before its official discovery. Galileo unknowingly observed Neptune while studying Jupiter more than two centuries before the planet’s official discovery. Introduction History is full of remarkable discoveries,…