Preview: Research scientist Benjamin Rackham of MIT explains how astronomers provided the data to reason that the exoplanets TRAPPIST-1b and TRAPPIST-1c are without atmosphere. More
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Preview: Research scientist Benjamin Rackham of MIT explains how astronomers provided the data to reason that the exoplanets TRAPPIST-1b and TRAPPIST-1c are without atmosphere. More. 1910 Royal Observatory at Greenwich.