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Trappist-1 planet orbits, illustration
Trappist-1 is a red-dwarf star – the most common variety – located some 40 light-years away in Aquarius. In 2015, astronomers discovered that Trappist-1 was host to three Earth-sized planets. In 2017 NASA scientists found an additional four planets, taking the total up to seven. This is the most terrestrial planets that have ever been found to orbit a single star, including our own Solar System. Trappist-1 is only fractionally larger than Jupiter in diameter. This image shows the star and the seven planets from above their orbital plane. All of the planets and the star are to scale.
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