On September 9, 1999, a team of astronomers from the High Altitude Observatory made a groundbreaking discovery. Using the radial velocity method, they detected a massive, Jupiter-sized planet orbiting a Sun-like star HD 209458. This was the first exoplanet to be discovered using this method, and since that fateful day, this system has become a champion of firsts. Show Notes Available at https://exoplanetradio.com/exoplanets/osiris-exoplanet-changed-everything/.