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.