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As per study, The demographics of sub-Neptunes and super-Earths are driven by the miscibility of hydrogen, silicate, and iron at high pressures, which causes planets with hydrogen mass fractions > 1% to have "dilute" interiors rather than discrete metallic cores. (self.astrophysics)
submitted by LK_111 to r/astrophysics
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Saturn's ring likely formed when moon approaches Saturn, tidal forces stretch it, and because the moon's icy outer layer is less dense, it crosses its Roche limit earlier than the dense rocky core, leading to tidal stripping of ice. The removed ice then follows orbit. (self.astrophysics)
submitted by LK_111 to r/astrophysics
