Witnessing the Birth of a Distant Cluster of Galaxies (ESOcast Light 259)

Using ALMA, astronomers have detected a large reservoir of hot gas in the still-forming galaxy cluster around the Spiderweb galaxy — the most distant detection of such hot gas yet. This further reveals just how early these structures begin to form. Credit: ESO Directed by: Angelos Tsaousis and Martin Wallner. Editing: Angelos Tsaousis. Web and technical support: Gurvan Bazin and Raquel Yumi Shida. Written by: Rory Harris and Jonas Enander. Music: Stellardrone — Fermi Paradox. Footage and photos: ESO, M. Kornmesser, L. Calçada, ESO/C. Malin (), ESO/B. Tafreshi (). Scientific consultants: Paola Amico and Mariya Lyubenova. More information and download options: