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Artistic rendering of TRAPPIST-1h | NASA
Planets

TRAPPIST-1h Orbit Suggests It Is Too Cold for Life

Scientists have confirmed that all seven planets in the TRAPPIST-1 system circle their star in a sort of gravitational lockstep with one another.

May 24, 2017
10:20 AM EDT
The orbits of the seven planets around the star Trappist-1. The grey region is the zone, where liquid water could exist on the surface of the planets. On planet Trappist-1h liquid water is possible under a thick layer of ice. (1 AU is the distance between the Sun and the Earth.) | A. Triaud
This illustration shows an artist view of the seven Trappist-1 planets. | NASA/JPL-Caltech