Astronomers have discovered an Earth-size exoplanet called LP 791-18 d that differs significantly from our own planet.

LP 791-18 d is likely covered in volcanoes and experiences eruptions similar to Jupiter's moon Io, the most volcanically active place in our solar system.

The discovery of the exoplanet was made using data from NASA's Transiting Exoplanet Survey Satellite, the retired Spitzer Space Telescope, and ground-based telescopes.

LP 791-18 d is located 90 light-years away from Earth in the Crater constellation, where it orbits a small red dwarf star.

The exoplanet is part of a planetary system that includes two other known planets, LP 791-18 b and LP 971-18 c, which are larger than Earth.

LP 971-18 c, the massive planet, may contribute to the volcanism observed on LP 791-18 d by tugging on its orbit and causing elliptical revolutions.

The heating caused by the elliptical revolutions of LP 791-18 d's orbit drives volcanic activity on the planet, similar to the situation on Jupiter's moon Io.

While there is no direct evidence of volcanoes on LP 791-18 d yet, the periodic stretching caused by its orbit and the presence of neighboring planets suggest the possibility.

LP 791-18 d falls within the inner edge of the habitable zone, making it potentially capable of sustaining an atmosphere and allowing water to condense on its night side.

Volcanic activity on LP 791-18 d may help maintain an atmosphere and promote conditions conducive to the development of life.

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