A lineup of Trappist-1 planets from Trappist-1b in closest orbit to the star to Trappist-1h, with an orbit that's unconfirmed but believed to be the farthest. Trappist-1e, f and g are thought to have the best chance of supporting life.
This diagram compares the sizes of the newly discovered planets around the faint red star Trappist-1 with the Galilean moons of Jupiter and our inner solar system. All the planets found around Trappist-1 are of similar size to the Earth.
This chart compares the seven Trappist-1 planets with the planets of our inner solar system. Researchers first spotted exoplanets around the dim dwarf star in 2016, but recently discovered it's orbited by more Earth-like planets than originally thought.
This diagram compares the orbits of the newly discovered planets around the faint red star Trappist-1 with the Galilean moons of Jupiter our inner solar system. All the planets found around Trappist-1 orbit much closer to their star than Mercury is to the sun, but as their star is far fainter, they are exposed to similar levels of irradiation as Venus, Earth and Mars in the Solar System.
This artist's conception imagines what it might be like on the surface of Trappist-1f. The planet orbits in the habitable zone and is Earth-sized and probably rocky like our world. The side of the planet that permanently faces Trappist-1 could be covered by a large liquid ocean that might even support life.
Trappist-1 is located in the direction of the constellation Aquarius. The red ultracool dwarf star is too faint to see with small telescopes, but should you ever find yourself in control of Hubble or another powerful telescope, this star map shows you where to point it to find the fascinating star system.
Caption byEric Mack
/ Photo by ESO/IAU and Sky & Telescope