Transits. We all love them. Right now, we know of over four thousand exoplanets which transit their star and these transits teach us a lot about distant worlds. NASA's TESS mission is just getting started, looking to find even more transits! But TESS has a problem when it comes to long-period planets, because it only looks at most fields for a month - meaning sometimes it will see just a single transit of a planet. This makes it very tricky to determine the period and all sorts of biases affect our inference, as we explore in today's video! ► Kipping (2018), "The Orbital Period Prior for Single Transits", RNAAS, submitted: https://github.com/davidkipping/singletransits/blob/master/rnaas.pdf ► Our previous episode about TESS: https://youtu.be/-2SECBi-AP8 ► NASA TESS Mission Website: https://heasarc.gsfc.nasa.gov/docs/tess/ ► Villanova et al. (2018), "An Estimate of the Yield of Single-Transit Planetary Events from the Transiting Exoplanet Survey Satellite": https://arxiv.org/abs/1805.00956 ► TESS Mission Website: https://heasarc.gsfc.nasa.gov/docs/tess/ ► Outro music by Thomas Bergersen "Final Frontier": http://www.thomasbergersen.com ► Columbia University Department of Astronomy: http://www.astro.columbia.edu ► Cool Worlds Lab website: http://coolworlds.astro.columbia.edu ::Playlists For Channel:: Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds Cool Worlds Research ► http://bit.ly/CoolWorldsResearch Guest Videos ► http://bit.ly/CoolWorldsGuests Q&A Videos ► http://bit.ly/CoolWorldsQA Tabby's Star ► http://bit.ly/TabbysStar Science of TV/Film ► http://bit.ly/ScienceMovies ::Follow us:: SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe Cool Worlds Lab http://coolworlds.astro.columbia.edu Twitter https://twitter.com/david_kipping Instagram https://www.instagram.com/cool.worlds THANKS FOR WATCHING!!