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    • Supermassive black holes only 300 light years apart

      Boing Boing· 1 day ago

      Two supermassive black holes spotted by NASA telescopes are only 300 light years apart—unnervingly close in galactic terms. The celestial drainholes registered as spikes of bright light and were then…

    • Why are black holes stable against their own gravity?

      Phys.org· 6 days ago

      Neutron stars are timelike matter with a maximum mass of about 2.34 solar masses in quantum chromodynamics (the strong color force). Black holes are spacelike matter that have no maximum mass ...