ESOcast 78: Airglow Mystery

4 November 2015

The sites of ESO’s observatories in Chile were chosen for their minimal light pollution and pristine night skies. However, strange green and red colours in images of the night sky have become an increasingly common sight over the past few years. This ESOcast takes a look at what causes these mysterious glows, and why we are seeing more and more of them.

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Editing: Herbert Zodet.
Web and technical support: Mathias André and Raquel Yumi Shida.
Written by: Petr Horálek, Stefan Noll, Christopher Marshall, Richard Hook and Herbert Zodet.
Narration: Sara Mendes da Costa.
Music: STAN DART (
Footage and photos: ESO, L. Calçada, M. Kornmesser, S. Brunier, R. Wesson, C. Malin (, José Francisco Salgado (, Courtesy of NASA/SDO and the AIA, EVE and HMI science teams, Earth Science and Remote Sensing Unit, NASA Johnson Space Center ( BeyondThePhotography/CrewEarthObservationsVideos/) ISS029-E-18677, ESA/Hubble, S. Guisard (, Y. Beletsky (LCO), John Chandler, Bill Geneczko, Oliver Holzbauer and B. Tafreshi (
Supported by FWF, Austria.
Directed by: Herbert Zodet.
Executive producer: Lars Lindberg Christensen.



Richard Hook
ESO Public Information Officer
Garching bei München, Germany
Tel: +49 89 3200 6655
Cell: +49 151 1537 3591

About the Announcement



Screenshot of ESOcast 78
Screenshot of ESOcast 78


ESOcast 78: Airglow
ESOcast 78: Airglow
ESOcast78 excerpt: Creating Ozone
ESOcast78 excerpt: Creating Ozone
ESOcast78 excerpt: Chemiluminescence
ESOcast78 excerpt: Chemiluminescence
ESOcast 78 excerpt: Airglow Altitudes
ESOcast 78 excerpt: Airglow Altitudes