The NASA/ESA Hubble Space Telescope has found a blistering hot-Jupiter exoplanet where it ‘snows’ titanium dioxide, the active ingredient in sunscreen. The Hubble observations are the first detections of this ‘snow-out’ process — called a ‘cold trap’ — on an exoplanet. This illustration shows Kepler-13Ab that circles very close to its host star, Kepler-13A. In the background is the star’s binary companion, Kepler-13B, and...
