Free Astronomy Magazine September-October 2018

27 SEPTEMBER-OCTOBER 2018 PLANETOLOGY outer regions of the icy mantle, where most of the impactor ice is deposited.” […] “Our simulations are showing a thermal boundary layer that might suppress convection and provide a blanket to contain the heat in the central region of Uranus.” entific article appearing in the ApJ is quite interesting: “This layer of impactor ice could also be a compositional boundary if the icy material is not identical to that in the proto- Uranus.” […] “Sub-adiabatic temperature gradients are typically created toward the A summary of the two phases collision suffered by Uranus, with the indication of the times. [ApJ, J. Kegerreis et al.]