Astronomers using ESO's Very Large Telescope have for the first time directly observed granulation patterns on the surface of a star outside the Solar System — the ageing red giant π1 Gruis. This remarkable new image from the PIONIER instrument 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 kilometres across. These new results are being published this week in the journal Nature. The release, images and videos are available on:
http://www.eso.org/public/news/eso1741/ Kind regards,
The ESO Education and Public Outreach Department
20 December 2017
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