Are We Alone? - NASA Science

At our hearts, we are seekers, and today we celebrate a scientific milestone! NASA’s Exoplanet Archive reached 6,000 confirmed exoplanets, or planets beyond our solar system. 🎉 Scientists have been searching for exoplanets for decades. Thirty years ago, the first exoplanet was discovered around a Sun-like star. The number rapidly increased as technologies improved and the exoplanet research community grew. Don’t worry, we’re not done yet — thousands of additional exoplanet candidates await conf