Shrinking Planets Could Explain Mystery of Universe’s Missing Worlds

Since 2017, scientists have been confounded by the “radius gap” — the lack of exoplanets with radii 1.5 to two times bigger than the Earth’s. Recently, however, a team of researchers propose that perhaps planets — particularly mini-Neptune’s whose gases may be stripped away by heat or radiation — shrink over time, with the smallest mini-Neptune’s quickly turning into medium-sized super-Earths, while large mini-Neptune’s taking longer to lose their gases to become the largest super-Earths. Read full article here


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