How did they actually take this picture? (Very Long Baseline Interferometry)

This is an image of the supermassive black hole, Sagittarius A*, at the center of our Milky Way galaxy.
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Image of Sgr A* from EHT collaboration
Event Horizon Telescope collaboration: ve42.co/EHT

Animations from The Relativistic Astrophysics group, Institute for Theoretical Physics, Goethe-Universität Frankfurt. Massive thanks to Prof. Luciano Rezzolla, Dr Christian Fromm and Dr Alejandro Cruz-Osorio.

A huge thanks to Prof. Peter Tuthill and Dr Manisha Caleb for feedback on earlier versions of this video and helping explain VLBI.

Great video by Thatcher Chamberlin about VLBI here –    • Very Long Baseline Interferometry & the Bl...  

Animations and simulations with English text:
L. R. Weih & L. Rezzolla (Goethe University Frankfurt)
   • Accretion flow onto a Kerr Black Hole and ...  

Video of stars going around Sgr A* from European Southern Observatory
www.eso.org/public/videos/eso1825e/

Video zooming into the center of our galaxy from European Southern Observatory
   • Zooming into the black hole at the centre ...  

Video of observation of M87 courtesy of:
C. M. Fromm, Y. Mizuno & L. Rezzolla (Goethe University Frankfurt)
   • Using VLBI to create an Image of the black...  

Video of observation of SgrA* courtesy of
C. M. Fromm, Y. Mizuno & L. Rezzolla (Goethe University Frankfurt)
Z. Younsi (University College London)
   • Using VLBI to create an Image of the black...  

Video of telescopes in the array 2017:
C. M. Fromm & L. Rezzolla (Goethe University Frankfurt)
   • Telescopes in the Event Horizon Telescope ...  

Animations and simulations (no text):
L. R. Weih & L. Rezzolla (Goethe University Frankfurt)
   • Accretion flow onto a Kerr Black Hole and ...  


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Written by Derek Muller
Animation by Ivy Tello, Mike Radjabov, Maria Raykova
Thumbnail by Ignat Berbeci
Filmed by Petr Lebedev