ESOcast 215 Light: Interstellar Thread of One of Life’s Building Blocks Revealed

Phosphorus, present in our DNA and cell membranes, is an essential element for life. But how it arrived on the early Earth is something of a mystery. Astronomers have now traced the journey of phosphorus from star-forming regions to comets using the combined powers of ALMA and the European Space Agency’s probe Rosetta.

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: Caroline Reid and Bárbara Ferreira.
Music: Stellardrone — Comet Halley.
Footage and photos : ALMA (ESO/NAOJ/NRAO), Rivilla et al., ESA/Rosetta/NAVCAM , Mario Weigand,, Digitized Sky Survey 2, C. Malin (, M. Kornmesser, L.Calçada and Nick Risinger (
Scientific consultants: Paola Amico and Mariya Lyubenova.

About the Video

Release date:15 January 2020, 12:00
Related releases:eso2001
Duration:01 m 35 s
Frame rate:25 fps

About the Object

Type:Solar System : Interplanetary Body : Comet
Solar System

Ultra HD (info)



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