ESOcast 234 Light: Most distant quasar with powerful radio jets discovered

With the help of ESO’s Very Large Telescope, astronomers have discovered and studied in detail the most distant source of radio emission known to date. The source is a “radio-loud” quasar — a bright object with powerful jets emitting at radio wavelengths — that is so far away its light has taken 13 billion years to reach us. This video summarises the discovery.

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:  Justin Tabbett, Anna Purdue and Bárbara Ferreira.
Music: Stellardrone — Comet Halley. 
Footage and photos:  ESO, M. Kornmesser, Digitized Sky Survey 2, N. Risinger ( and Gianluca Lombardi (
Scientific consultants: Paola Amico and Mariya Lyubenova. 

About the Video

Release date:8 March 2021, 14:00
Related releases:eso2103
Duration:01 m 37 s
Frame rate:25 fps

About the Object

Type:Early Universe : Galaxy : Activity : AGN : Quasar
Quasars and Black Holes

Ultra HD (info)



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