π1 Gruis: Giant Bubbles on Red Giant Star’s Surface | ESO
ESOcast 144 Light: Astronomers using ESO’s Very Large Telescope (VLT) have directly observed granulation patterns on the surface of a star outside the Solar System—the ageing red giant π1 Gruis.
A remarkable image from the PIONIER instrument reveals the convective cells that make up the surface of this huge star, which is 350 times larger than the Sun. Each cell covers more than a quarter of the star’s diameter and measures about 120 million kilometers across.
The ESOcast Light is a series of short videos bringing you the wonders of the Universe in bite-sized pieces.
Credit: European Southern Observatory (ESO)
Directed by: Nico Bartmann
Editing: Nico Bartmann
Web and technical support: Mathias André and Raquel Yumi Shida
Written by: Rosa Jesse and Richard Hook
Footage and photos: ESO, B. Lazareff (LAOG), Digitized Sky Survey 2, N. Risinger, NASA, SDO, M. Kornmesser, L. Calçada, H. Boffin, ESA
Executive producer: Lars Lindberg Christensen
Duration: 1 minute, 24 seconds
Release Date: December 20, 2017
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