Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypodSyzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.On the web: syzygy.fm | Twitter: @syzygypodThings we talk about in this episode:International Year of the Periodic Table: https://www.iypt2019.orgDmitri Mendeleev: https://en.wikipedia.org/wiki/Dmitri_MendeleevFarewell, Opportunity. You’ve done so very well! https://www.jpl.nasa.gov/news/news.php?feature=7334Astronomer’s Periodic Table by Periodic Videos: https://www.youtube.com/watch?v=6akrRznGgDcStellar nucleosynthesis: https://www.thoughtco.com/stellar-nucleosynthesis-2699311Big Bang nucleosynthesis: http://www.einstein-online.info/spotlights/BBN.htmlSupernova nucleosynthesis: https://en.wikipedia.org/wiki/Supernova_nucleosynthesisNeutron star mergers: https://physics.aps.org/articles/v10/114The elements song, by Tom Lehrer: https://www.youtube.com/watch?v=AcS3NOQnsQMAn updated version, by Helen Arney: https://www.youtube.com/watch?v=UzvjB5hC2qc