Researched
Kepler Planet Census
NASA's Kepler telescope (launched 2009) watches 150,000 stars for the tiny dimming of passing planets and finds thousands.
Open in the interactive tree →Kepler showed that planets are common and that small rocky worlds in the habitable zone exist around many stars. It turned exoplanets from curiosities into a statistical science.
Prerequisites
Unlocks
- Finding extraterrestrial lifeopenKepler showed how common planets in habitable zones are