The planet was discovered using the NASA Transiting Exoplanet Survey Satellite (TESS) and the now-decommissioned Spitzer space telescope. It revolves around a small red dwarf.
LP 791-18d is slightly larger and heavier than Earth, tidal with one side constantly facing its star. While the side facing the star is too hot to keep the water in a liquid state, scientists think the planet’s volcanic activity may support the atmosphere and allow water to condense on the dark side.
LP 791-18d is located in the habitable zone, often referred to as the “Goldilocks Zone”, where conditions are just right for liquid water to exist on the planet’s surface.
Astronomers are planning further investigations, including studying the planet’s atmosphere using the James Webb Space Telescope.
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