Orbit of Earth-Size Exoplanet TRAPPIST-1h in Alien Solar System Nailed Down

Tuesday, May 23, 2017 - 07:01 in Astronomy & Space

Astronomers have nailed down the path of the outermost planet in the TRAPPIST-1 system, finding that this world takes 19 Earth days to complete one lap around its small, faint host star.

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