Five-planet system 1st to be found entirely by crowdsourcing
A system of at least five exoplanets has been discovered by science enthusiasts, becoming the first multi-planet system discovered entirely through crowdsourcing. Using data from NASA's Kepler Space Telescope, a project called Exoplanet Explorers initially found a four-planet system and named it K2-138 in 2017. However, fresh observations have shown it has a fifth planet and perhaps even a sixth.