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John Regehr (regehr@mastodon.social)'s status on Monday, 17-Jun-2024 19:02:41 JST John Regehr

someone turn out the lights, astrophysics is done https://en.wikipedia.org/wiki/Nuclear_pasta
In conversation about 5 months ago from mastodon.social permalink
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  Nuclear pasta
  
  In astrophysics and nuclear physics, nuclear pasta is a theoretical type of degenerate matter that is postulated to exist within the crusts of neutron stars. If it exists, nuclear pasta would be the strongest material in the universe. Between the surface of a neutron star and the quark–gluon plasma at the core, at matter densities of 1014 g/cm3, nuclear attraction and Coulomb repulsion forces are of comparable magnitude. The competition between the forces leads to the formation of a variety of complex structures assembled from neutrons and protons. Astrophysicists call these types of structures nuclear pasta because the geometry of the structures resembles various types of pasta. Formation Neutron stars form as remnants of massive stars after a supernova event. Unlike their progenitor star, neutron stars do not consist of a gaseous plasma. Rather, the intense gravitational attraction of the compact mass overcomes the electron degeneracy pressure and causes electron capture to occur within the star. The result is a compact ball of nearly pure neutron matter with sparse protons and electrons interspersed...
2. When the gnocchi phase is compressed, as would be expected in deeper layers of the crust, the electric repulsion of the protons in the gnocchi is not fully sufficient to support the existence of the individual spheres, and they are crushed into long rods, which, depending on their length, can contain many thousands of nucleons. These rods are known as the spaghetti phase. Further compression causes the spaghetti phase rods to fuse and form sheets of nuclear matter called the lasagna phase. Further compression of the lasagna phase yields the uniform nuclear matter of the outer core. Progressing deeper into the inner crust, those holes in the nuclear pasta change from being cylindrical, called by some the bucatini phase or antispaghetti phase, into scattered spherical holes, which can be called the Swiss cheese phase.l! The nuclei disappear at the crust—core interface, transitioning into the liquid neutron core of the star.
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  Dr. Victoria Grinberg (vicgrinberg@mastodon.social)'s status on Monday, 17-Jun-2024 23:44:18 JST Dr. Victoria Grinberg
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  - Little Detritus
  @littledetritus @regehr
  https://mastodon.social/@vicgrinberg/109819714252450021 :)
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    Dr. Victoria Grinberg (@vicgrinberg@mastodon.social)
    
    from Dr. Victoria Grinberg
    
    Get close to a black hole, and you'll suffer spaghettification, the tidal effect of an extremely strong gravitational field. Did you know that neutron stars contain nuclear pasta, neutrons condensed into strange shapes? There is also the "Swiss Cheese" Universe model in cosmology. And don't forget the Gaia Sausage, the remains of a dwarf galaxiy that merged with our Milky Way billions of years ago. Yeah, I am also getting hungry when doing astro... #astrodon #astronomy #VicisAstro #scicomm
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  Little Detritus (littledetritus@geraffel.social)'s status on Monday, 17-Jun-2024 23:44:27 JST Little Detritus
  in reply to
  - Dr. Victoria Grinberg
  @regehr cc @vicgrinberg look Italian food!
  
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