STELLAR CORPSES The leftover, compressed cores of stars gone supernova, neutron stars often have extreme magnetic fields, some of which give rise to flares and jets. They have surface temperatures on the order of a million kelvin. ESO / L. Calçada s k y a n d t e l e s c o p e .c o m * J U LY 2 017 17http://www.skyandtelescope.com