Hi everyone, I'm sitting my A-Level physics this year and am currently doing a bit of revision. I was reading about Neutron Stars and Supernovas when I came across this: "when the outer layers hit the surface of the neurtron star they rebound, setting up huge schockwaves, ripping the star apart and causing a supernova" What I don't understand is how the outer layers "rebound". In my head the neutron star is attracting the outer layers too strongly for them to get away at the speed with which they approach. Please could someone explain this to me and/or give me a better way to think about it! Thanks in advance!