A team of astronomers has discovered a giant object — an enormous, Jupiter-like exoplanet or a low-mass brown dwarf — orbiting an ageing red giant called L2 Puppis, and they have also precisely measured the mass and the age of the star. Composite view of L2 Puppis in visible light. Image credit: Kervella et al / CNRS / University of Chile / Observatory of Paris / LESIA / ESO / ALMA. “Five billion years from now, the Sun will have grown...