Find us on Twitter: @syzygypodOr just visit us at home: syzygy.fmEmily is an astronomer at the University of York: www.york.ac.uk/physics/people/brunsden/Chris can be found online: kipstewart.comSome of the things we talk about in this episode:Geocentric models of the universe: en.wikipedia.org/wiki/Geocentric_modelRetrograde motion of planets & heliocentric models: earthobservatory.nasa.gov/Features/OrbitsHistory/Poor Pluto: www.universetoday.com/13573/why-pluto-is-no-longer-a-planet/First exoplanet confirmed 1995: exoplanets.nasa.gov/resources/2084/The transit method: www.planetary.org/explore/space-topics/exoplanets/transit-photometry.htmlKepler mission: kepler.nasa.govExoplanets we know of: exoplanets.nasa.govOur location in the Milky Way: www.universetoday.com/65601/where-is-earth-in-the-milky-way/Douglas Adams’ Hitchhikers opening line: www.goodreads.com/quotes/54481-far-out-in-the-uncharted-backwaters-of-the-unfashionable-endExtragalactic planets paper: iopscience.iop.org/article/10.3847/2041-8213/aaa5fbExtragalactic planets news story: www.sciencealert.com/planets-found-in-another-galaxy-quasar-gravitational-microlensingQuasars: www.spacetelescope.org/science/black_holes/Gravitational Lensing: en.wikipedia.org/wiki/Gravitational_lensEinstein and the solar eclipse: www.forbes.com/sites/startswithabang/2017/07/04/how-a-solar-eclipse-first-proved-einstein-right/#6bda2738766aFunhouse quasar image: phys.org/news/2018-02-astrophysicists-planets-extragalactic-galaxies-microlensing.htmlRogue planets: en.wikipedia.org/wiki/Rogue_planetPlanet HIP13044b: www.space.com/9556-alien-planet-galaxy-discovered.htmlGalactic Cannibalism: www.universetoday.com/89086/galactic-cannibalism/Exoplanet in Andromeda: www.newscientist.com/article/dn17287-first-extragalactic-exoplanet-may-have-been-found/Exoplanet microlensing a quasar: en.wikipedia.org/wiki/Extragalactic_planet#Twin_Quasar-related_planet