When Quasars Collide STJC

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here:

So what happens when two Super Massive Black Holes collide? We may be about to find out, because astronomers have spotted a pair of them in a close binary orbit for the very first time.

This episode of Space Time Journal Club discusses:
“A candidate sub-parsec binary black hole in the Seyfert galaxy NGC 7674”, Kharb, Lal & Merritt 2017

You can further support us on Patreon at
Get your own Space Time t­shirt at
Tweet at us! @pbsspacetime
Email us! pbsspacetime [at] gmail [dot] com
Comment on Reddit:

Help translate our videos!

Previous Episode:
Are the Fundamental Constants changing?

Related Episodes:
How to Build a Black Hole

Why Quasars are so Awesome

Links to Comments Response:


Lutra Nereis

Arnaldo Castro




In this video, we discuss the reports about the detection of a pair of supermassive black holes orbiting only one light year apart from each other. Studying the dance of these giants should tell us a ton about how black holes grow. This paper was just published in Nature Astronomy by Preeti Kharb and Dharam Vir Lal from India’s National Center for Radio Astrophysics, and David Merritt from the Rochester Institute of Technology.

Written and Hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Kurt Ross
Assistant Editing and Sound Design by Mike Petrow
Made by Kornhaber Brown (

Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters:

Big Bang
David Nicklas
Richard Senegor

Tambe Barsbay
Mayank M. Mehrota
Mars Yentur
Mark Rosenthal
Dean Fuqua
Justin Lloyd

Edmund Fokschaner
Max Levine
Matthew O’Connor
Eugene Lawson
Barry Hatfield
Martha Hunt
Joseph Salomone
Chuck Zegar
Craig Peterson
Jordan Young
John Hofmann

Thanks to our Patreon Gamma Ray Burst Supporters:
Nick Virtue
Alexey Eromenko
Nicholas Rose
Scott Gossett
Mark Dykstra
Peter Durocher
Michael Kers
Chris Hicks
Mark Vasile
Patrick Murray
Sultan Alkhulaifi
Alex Seto
Michal-Peanut Karmi
Erik Stein
Daniel Lyons
Kevin Warne
JJ Bagnell
J Rejc
Amy Jie
Avi Goldfinger
John Pettit
Shannan Catalano
Florian Stinglmayr
Yubo Du
Benoit Pagé-Guitard
Nathan Leniz
Jessica Fraley
Loro Lukic
Brandon Labonte
David Crane
Greg Weiss

Products You May Like

Articles You May Like

25 Acronyms & Initialisms
Do hats cause balding? – Big Questions – (Ep. 227)
The Secrets of Feynman Diagrams
How A Whale And A Bear Beat The System
Feeding Frenzy – Paul McMahon

Leave a Reply

Your email address will not be published. Required fields are marked *