Space Quiz: How Much Do You Know About The Universe? 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 have been able to use its eyes to confirm the existence of over a thousand exoplanets in just one sliver of the galaxy. ( Dawid Kasza / Getty ) Produced by Angus Chen Produced by PRI and WNYC