Cosmic Mystery Solved: Scientists Uncover Two Distinct Sub-Neptune Populations

An international research group, including scientists from UNIGE, UNIBE, and PlanetS, has demonstrated that sub-Neptunes belong to two separate populations, resolving a debate in the scientific community. Most stars in our galaxy host planets, with sub-Neptunes—planets sized between Earth and Neptune—being the most common. However, calculating their density presents a challenge for scientists. Depending on [...]

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