An Earth-sized planet orbiting a dim star in our galactic neighborhood is offering some of the best evidence to date of volcanism beyond our solar system, with observations suggesting a rugged and rocky world tormented by constant eruptions.
The planet's volcanism was not directly observed but rather inferred due to its significant gravitational interaction with the larger of the two other planets orbiting the dim star. The gravitational tug from the larger planet may squeeze and flex the newly identified one, heating up its interior and causing surface volcanic activity, similar to Io, the researchers said.
The planet is located in the Milky Way about 86 light-years away from our solar system in the direction of the constellation Crater. A light year is the distance light travels in a year, 5.9 trillion miles . "I imagine a rugged, young surface for the planet after many millions of years of constant volcanic activity. Since the gravitational effects don't care about day and night side, I also suspect the volcanic activity to be evenly spread over the planetary surface," said University of California, Riverside planetary astrophysicist and study co-author Stephen Kane.
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