There's Basically 'No Chance' for Earth-Like Planets to Form an Atmosphere Around Hot Young Stars

Live Science | 4/25/2019 | Staff
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Recent exoplanet surveys suggest that there might be thousands of Earth-like worlds in other solar systems, just waiting to be discovered. It's too bad that their atmospheres — and, with them, any hope of sustaining life — were probably obliterated by their local stars.

"An Earth-like atmosphere cannot form when the planet is orbiting within the habitable zone of a very active star," the researchers wrote in the study. "Instead, such an atmosphere can only form after the activity of the star has decreased to a much lower level."

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When astronomers talk about the activity of a star, they're referring to the amount of radiation emitted. Not unlike humans and puppies, young stars tend to be highly active, then significantly decrease their activity levels as they age....
(Excerpt) Read more at: Live Science
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