Pascal Tremblin

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.

Astronomers studied the twinkling of the binary brown dwarf system WISE 1049AB. For the warmer component, light from methane and carbon monoxide fluctuated more than from water, which can't be explained by clouds. A new mechanism—chemical instability—has been discovered. A 3D map of atmospheric wave