Renyu Hu

Meticulous 14-year observations of three 'cotton-candy' exoplanets in Kepler-51 yielded an unexpected surprise. The James Webb Space Telescope recorded the outermost known planet crossing the star's disk two hours ahead of schedule. The anomaly was only explained by adding an invisible fourth planet

At Alpha Centauri A, the nearest Sun-like star, Webb briefly picked up a dot called S1 — a planet candidate the size of Jupiter but with a temperature around –20°C. The object hid behind the star — its orbit lasts just 2–3 years, and there’s remarkably little dust around.