New planets outside our solar system! We discovered the most Earth-sized planets found in the habitable zone of a single star, called TRAPPIST-1. This system of seven rocky worlds-all of them with the potential for water on their surface-is an exciting discovery in the search for life on other worlds. The discovery sets a new record for greatest number of habitable-zone planets found around a single star outside our solar system. All of these seven planets could have liquid water - key to life as we know it - under the right atmospheric conditions, but the chances are highest with the three in the habitable zone.

This illustrations show planets of the TRAPPIST-1 system, including a travel poster and the possible surface of TRAPPIST-1f, one of the newly discovered planets. 
Credits: NASA/JPL-Caltech

#nasa #space #exoplanet #earthlike #habitablezone #star #trappist1 #astronomy #spitzer #science
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