Episode sponsored by Jane Street - check out their latest opportunities - https://www.janestreet.com/join-jane-street/overview/

Professor Michael Merrifield - https://about.me/michael.merrifield

Mike's Twitter - https://twitter.com/AstroMikeMerri

Mike Merrifield Video Playlist - http://bit.ly/Merrifield_Playlist

Sixty Symbols - Physics videos, many featuring Mike - https://www.youtube.com/user/sixtysymbols

Deep Sky Videos - https://www.youtube.com/user/deepskyvideos

Messier Objects Playlist - http://bit.ly/MessierObjects

Ralph Merrifield - https://en.wikipedia.org/wiki/Ralph_Merrifield

Ralph Merrifield author page on Amazon - https://amzn.to/3Hff0Gj

Galactic Astronomy by James Binney and Michael Merrifield - https://amzn.to/3Xme4Fs

Hand-written version of Mike's 'Good Will Hunting' paper - https://brady-haran.squarespace.com/s/MerrifieldPaperHandWritten.pdf

And here is the published version - https://adsabs.harvard.edu/full/1990AJ.....99.1548M

You can support Numberphile on Patreon - https://www.patreon.com/numberphile) like these people - https://www.numberphile.com/patrons

With thanks to SLMath - https://www.msri.org