6,000 Exoplanets and Counting

On September 17, 2025, NASA announced (nasa.gov/universe/exoplanets/nasas-tally-of-pl…) that the number of exoplanets, planets outside our solar system, tracked by NASA has reached 6,000. In the three decades since the groundbreaking detection of exoplanet 51 Pegasi b (science.nasa.gov/exoplanet-catalog/51-pegasi-b), the first confirmed planet orbiting a Sun-like star, astronomers have concluded that exotic worlds are everywhere.