On October 6, 1995, astrophysicists Michel Mayor and Didier Queloz shattered humanity's cosmic solipsism by announcing the discovery of 51 Pegasi b—the first confirmed exoplanet orbiting a sun-like star. Detected via minute radial-velocity wobbles measured by the ELODIE spectrograph, this scorched gas giant obliterated textbook planetary formation models. Dubbed a 'Hot Jupiter,' it hugged its host star in an impossible four-day orbit, proving that nature's planetary architectures were far weirder and more chaotic than our own neighborhood.
Mayor and Queloz did not just isolate a spectral anomaly; they booted up modern exoplanetology. That single gravitational tug transformed the search for alien worlds from fringe speculation into a data-rich observational science. With thousands of worlds now cataloged by robotic surveys, our cosmic horizon permanently expanded the moment 51 Pegasi b revealed that the universe is teeming with strange, uncharted real estate.