Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.Find us on Twitter: @syzygypod twitter.com/SyzygyPodOr just visit us at home: syzygy.fmEmily at the University of York: www.york.ac.uk/physics/people/brunsden/Chris online: kipstewart.comTo view the podcast chapter list and artwork in this episode, you could do worse than use the Overcast app on iOS, or Pocket Casts on Android. (Other podcast players are available, though they may not handle mp3 chapters nicely.)Some of the things we talk about in this episode:• A listener question from Circus Stu! https://www.circusskillsyorkcic.org• James Clerk Maxwell: https://digital.nls.uk/scientists/biographies/james-clerk-maxwell/discoveries.html• Wave-particle duality of light: https://www.youtube.com/watch?v=Iuv6hY6zsd0• Einstein’s Special Theory of Relativity: http://www.einstein-online.info/elementary/specialRT.html• General Theory of Relativity: https://www.newscientist.com/round-up/instant-expert-general-relativity/• Bowling balls and rubber sheets: https://www.youtube.com/watch?v=MTY1Kje0yLg• Brian Cox drops stuff in a vacuum: https://www.youtube.com/watch?v=E43-CfukEgs• Mass is weird: https://www.youtube.com/watch?v=Ztc6QPNUqls• Neutrino astronomy: https://www.space.com/24334-neutrino-telescopes-astronomy-new-era.html• Gravitational waves: https://www.ligo.caltech.edu/page/what-are-gw• Gravitational wave Astronomy: https://www.scientificamerican.com/article/the-future-of-gravitational-wave-astronomy/• Dark Sky Reserves: http://darksky.org