Astronomers used the Hubble Space Telescope to determine that a nearby exoplanet is losing its atmosphere due to interactions with its star
The Hubble Space Telescope captured an unexpected observation of a nearby planet that’s having its atmosphere blasted away by energetic outbursts from its star. It’s a dramatic change from the last time Hubble checked up on the planetary system and saw nothing amiss. The red dwarf star, called AU Microscopii, or AU Mic, is located outside of our solar system 32 light-years from Earth, which is relatively close .
As the planet is blasted by radiation, its atmosphere heats to the point that it escapes the planet’s gravity and puffs out into space. “This frankly strange observation is kind of a stress-test case for the modeling and the physics about planetary evolution,” Rockliffe said. “This observation is so cool because we’re getting to probe this interplay between the star and the planet that is really at the most extreme.
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