Want to help us make Syzygy even better? Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod———————————Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.Visit us at syzygy.fm or find us on Twitter: @syzygypodThings we talk about in this episode:The Goblin paper: https://arxiv.org/pdf/1810.00013.pdfA more readable story about The Goblin: https://www.smithsonianmag.com/science-nature/new-discovery-goblin-stirs-signs-elusive-planet-9-180970442/The Astronomical Unit: https://en.wikipedia.org/wiki/Astronomical_unitThe Kuiper Belt: https://solarsystem.nasa.gov/solar-system/kuiper-beltThe Voyager missions: https://voyager.jpl.nasa.govThe Heliopause: https://en.wikipedia.org/wiki/HeliosphereThe Oort Cloud: https://solarsystem.nasa.gov/solar-system/oort-cloudOur nearest star (other than the Sun, which is a star also): https://en.wikipedia.org/wiki/Proxima_CentauriTrans-Neptunian Objects: https://www.universeguide.com/fact/kuiperbeltThe Subaru Telescope: https://subarutelescope.orgThe Skymapper Telescope: https://rsaa.anu.edu.au/observatories/telescopes/skymapper-telescopeThe Zooniverse — get some Citizen Science going: https://www.zooniverse.org/Zooniverse — Backyard Worlds: https://www.zooniverse.org/projects/marckuchner/backyard-worlds-planet-9