Today's Top Space Headline --NASA's Next Step in the Quest for Alien Earths: "Could Ultimately Discover 20,000 New Planets"

Launching in April on a two-year primary mission, the observatory could ultimately discover 20,000 planets--some of which could be much like our own. Ultimately, TESS could contribute as many as 20,000 new planets to the exoplanet catalogue, most of which...