One in every five sunlike stars in the Milky Way may have an Earth-sized planet circling it in the Goldilocks zone--the sweet spot where liquid water could exist. That's according to a new analysis of data from the Kepler spacecraft. Sara Seager, an exoplanet hunter at MIT, talks about what's next in the hunt for Earth 2.0.
Searching for Earth 2.0
By editor • Nov 15, 2013