👉On January 28, history passed quietly by a discovery that wouldn’t be understood for more than two centuries. While studying Jupiter with his early telescope, Galileo Galilei noticed a faint point of light nearby. He recorded it as just another star. What he didn’t realize was that this tiny speck was actually Neptune — a planet so distant that, at the time, no one imagined the solar system could extend that far. Because Neptune is incredibly far from Earth, it moves very slowly across the sky