Alien evolution? Mini-Neptunes can split their atmosphere and become a super-Earth

New research shows that stellar radiation is stripping the “soft” atmospheres of exoplanets slightly smaller than Neptune, leaving behind their rocky cores and transforming them into worlds that closely resemble more with the Earth.

In the 1990s, astronomers confirmed the existence of planets outside the solar system. Known as exoplanets, they are among the most fascinating objects of modern astronomy. Spacecraft such as NASA’s pioneering Kepler observatory and the Transiting Exoplanet Survey Satellite (TESS) scanned the sky looking for periodic drops in the brightness of nearby stars. This flicker is an indication that a star is hosting a planet, which has passed the star’s face and temporarily blocked its light.

https://www.space.com/mini-neptune-exoplanet-transform-super-earth Alien evolution? Mini-Neptunes can split their atmosphere and become a super-Earth

James Brien

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