Trappist-1 System Orbit Comparison

All seven planets of the TRAPPIST-1 system orbit closer to their host star than Mercury does to the Sun. This diagram compares the orbits of the seven TRAPPIST-1 planets around their star, which are labeled from b to h, to the orbits of the inner solar system planets around the Sun. The orbital areas of TRAPPIST-1 b, c, and d are red to indicate they are too close to be in the host star’s habitable zone. TRAPPIST-1 e, f, and g are in their host star’s habitable zone (in green), the area where the conditions are just right for liquid water to exist on a planet’s surface. The orbital area of planet h is blue to indicate the planet is too far away to be in the host star’s habitable zone.