The density distinction of sub-Neptunes lastly deciphered

The vast majority of stars in our galaxy are residence to planets. Essentially the most ample are the sub-Neptunes, planets between the scale of Earth and Neptune. Calculating their density poses an issue for scientists: relying on the tactic used to measure their mass, two populations are highlighted, the dense and the much less dense. Is that this attributable to an observational bias or the bodily existence of two distinct populations of sub-Neptunes? Latest work argues for the latter.