ESOcast 236 Light: First interstellar comet may be the most pristine ever found

New observations with the European Southern Observatory’s Very Large Telescope (ESO’s VLT) indicate that the rogue comet 2I/Borisov, which is only the second and most recently detected interstellar visitor to our Solar System, is one of the most pristine ever observed. This video summarises new findings on this mysterious alien visitor.

The video is available in 4K UHD.

The ESOcast Light is a series of short videos bringing you the wonders of the Universe in bite-sized pieces. The ESOcast Light episodes will not be replacing the standard, longer ESOcasts, but complement them with current astronomy news and images in ESO press releases.



Directed by: Herbert Zodet.
Editing : Herbert Zodet.
Web and technical support: Gurvan Bazin and Raquel Yumi Shida.
Written by: Thea Elvin, Anna Purdue and Bárbara Ferreira.
Music: STAN DART ( – Reflections.
Footage and photos: ESO, O. Hainaut, E. Slawik, M. Kornmesser, ESA/Space Engine ( Calçada, Petr Horálek, Daniele Gasparri ( and C. Malin (
Scientific consultants: Paola Amico and Mariya Lyubenova.


About the Video

Release date:30 March 2021, 17:00
Related releases:eso2106
Duration:01 m 41 s
Frame rate:25 fps

About the Object

Type:Local Universe : Interplanetary Body : Comet

Ultra HD (info)



Video Podcast
24.6 MB

For Broadcasters


62.3 KB