Astronomers have made the most precise test ever of general relativity outside the Milky Way.

A nearby galaxy acts as a strong gravitational lens, distorting light from a distant galaxy behind it to create an Einstein ring around its centre. By comparing the mass of the lensing galaxy with the curvature of space around it, the astronomers found that gravity on these astronomical length-scales behaves as predicted by general relativity.

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Credit:
ESO

Directed by: Nico Bartmann.
Editing: Nico Bartmann.
Web and technical support: Mathias André and Raquel Yumi Shida.
Written by: Stephen Molyneux and Richard Hook.
Music: tonelabs (tonelabs.com).
Footage and photos: ESO, ESA, Hubble, M. Kornmesser, J. Colosimo, ALMA, NRAO, NAOJ, L. Calçada and the Hubble Heiratage Team (STScl/AURA).
Executive producer: Lars Lindberg Christensen.

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ESOcast

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ESOcast is a video podcast series dedicated to bringing you the latest news and research from ESO – Astronomy made on planet Earth. Here we explore the Universe's ultimate frontier with our host Doctor J, a.k.a. Dr. Joe Liske.

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ESOcast is a video podcast series dedicated to bringing you the latest news and research from ESO – Astronomy made on planet Earth. Here we explore the Universe's ultimate frontier with our host Doctor J, a.k.a. Dr. Joe Liske.

More about the ESOcast: eso.org/public/videos/archive/category/esocast/

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