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