... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Do pulsars beam neutrinos? ... A pulsar is a rotating neutron star possessing intense magnetic fields and spewing energy in a searchlight-like beam usually observed at radio wavelengths. ... If the beam intersects Earth," Link says, "the star would then be a neutrino pulsar." Neutrino pulsars could rank among the sky's strongest sources of high-energy muon neutrinos and might be the first such sources found. ...