From DeepSkyVideos.

Professor Meghan Gray explains the sometimes strange phenomenon of twin quasars. More links and info in full description ↓↓↓

Professor Gray is an astronomy professor at The University of Nottingham – https://www.nottingham.ac.uk/physics/people/meghan.gray

A close quasar pair in a disk–disk galaxy merger at z = 2.17 – https://doi.org/10.1038/s41586-023-05766-6

0957+561 A, B: twin quasistellar objects or gravitational lens? – https://ui.adsabs.harvard.edu/abs/1979Natur.279..381W/abstract

MULTIPLE-MIRROR TELESCOPE OBSERVATIONS OF THE TWIN QSOs 0957+561 A,B – https://articles.adsabs.harvard.edu/pdf/1979ApJ…233L..43W

Messier Objects playlist: http://bit.ly/MessierObjects

Deep Sky Videos website: http://www.deepskyvideos.com/
Twitter: https://twitter.com/DeepSkyVideos
Facebook: http://www.facebook.com/DeepSkyVideos
More about the astronomers in our videos: http://www.deepskyvideos.com/pages/contributors.html

Supported by the University of Nottingham
https://www.nottingham.ac.uk/astronomy/

Back us on Patreon: https://www.patreon.com/deepskyvideos

Video by Brady Haran and James Hennessy