Mini-Neptunes and super-Earths up to four times the size of our own are the most common exoplanets orbiting stars beyond our solar system. Until now, super-Earths were thought to be the rocky cores of mini-Neptunes whose gassy atmospheres were blown away. Astronomers show that some of these exoplanets never had gaseous atmospheres to begin with, shedding new light on their mysterious origins.
from Latest Science News -- ScienceDaily https://ift.tt/3qbu9gP
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