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Coolest space discoveries

Photos Logo Photos | Slide 2 of 14: This illustration shows the possible surface of TRAPPIST-1f, one of the newly discovered planets in the TRAPPIST-1 system. Scientists using the Spitzer Space Telescope and ground-based telescopes have discovered that there are seven Earth-size planets in the system.

TRAPPIST-1 planets

NASA revealed on Feb 22, 2017 that its Spitzer Space telescope has found a system of seven earth-sized planets around a single star. Three of these planets are in the habitable zone where water might be found. This is a new record for the greatest number of habitable-zone planets found around a single star outside our solar system. The system of planets, called TRAPPIST-1, is around 40 million light years from Earth.

(Pictured) This illustration shows the possible surface of TRAPPIST-1f, one of the newly discovered planets in the TRAPPIST-1 system.

© Space Frontiers/Hulton Archive/Getty Images; NASA; NASA/Reuters
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