Graduate student Tiffany Jansen recently submitted a new paper making the first-ever measurement of the reflectivity, or "albedo", of small exoplanets discovered by Kepler. In this video, Tiffany explains how we pulled off this trick by stacking different but similar planets together to boost signal-to-noise and showing for the first time that even sub-Neptune sized planets tend to be dark. Make sure to say congratulations to Tiffany and Moiya below who recently were awarded a prestiguous NSF fellowship for their excellent research! ::More about this Video:: ► Jansen & Kipping (2018), "Kepler's Dark Worlds: a Low Albedo for an Ensemble of Neptunian and Terran Exoplanets": https://arxiv.org/abs/1710.10213 ► "Reflections from an Alien World" Cool Worlds video: https://youtu.be/_A9CfEEXMqQ ► "The Darkest World" Cool Worlds video: https://youtu.be/ZdqooU-C3ts ► Columbia University Department of Astronomy: http://www.astro.columbia.edu ► Cool Worlds Lab website: http://coolworlds.astro.columbia.edu ► Outro music by 8-bit Universe "Harder Better Faster Stronger [8 Bit Cover Tribute to Daft Punk]": https://8bituniverse.bandcamp.com/track/harder-better-faster-stronger-8-bit-tribute-to-daft-punk ::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!!