Giant bubbles on red giant star’s surface
Astronomershave for the first time directly observed granulation patterns on the surface of a star outside the Solar System — the ageing red giant ?1 Gruis. This remarkable new image reveals the convective cells that make up the surface of this huge star, which has 350 times the diameter of the Sun. Each cell covers more than a quarter of the star’s diameter and measures about 120 million kilometers across. …read more
