Humans Are Made of Stardust: Discoveries From Exploring The Cosmos Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Since the Kepler Space Telescope launched in 2009, scientists on Earth have been able to use its eyes to confirm the existence of over a thousand exoplanets in just one sliver of the galaxy. ( Kevin Carden / Getty ) Produced by Angus Chen Produced by PRI and WNYC