Free TRAPPIST-1 Exoplanet Poster

NASA has made a poster of the the TRAPPIST-1 system available following their announcement on the discovery of the first known system of seven Earth-size planets around a single star. In this system, called TRAPPIST-1,  all of the planets are likely to be rocky based on their densities. Further, three of these planets are located in the habitable zone the where a rocky planet is most likely to have liquid water.

The TRAPPIST-1 star is classified as an ultra-cool dwarf and all seven planet orbits are closer to their star than Mercury’s orbit is to our Sun. The planets are also close to each other; to an observer on one of the planet’s surface, the others would appear larger than the moon our sky.

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