Earth-sized planet found orbiting a nearby star that will outlive the Sun by 100 billion years

a rocky planet orbiting a hot red star in space

Astronomers have discovered an Earth-sized planet that is receiving so much radiation that its atmosphere has long since eroded away, leaving it barren. Life as we know it cannot exist on this sizzling world, but astronomers are interested in it for another reason: for the first time, they may be able to see the geology of a planet outside our solar system.

The newly discovered exoplanet, called SPECULOOS-3 b, is a rocky planet about 55 light-years from Earth. It zooms around its host star every 17 hours, but the days and nights on this planet are endless. Astronomers suspect that the planet is tidally locked to its star, just as the moon is to Earth. One day side always faces the star, while the night side is locked in eternal darkness.

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