Related by context. Frequent words. (Click for all words.) 72 gravitational waves 66 X ray emission 65 gravitational wave 64 accretion disk 64 magnetar 64 quasar 64 gamma rays 63 galaxy formation 63 supernovae 62 quasars 62 neutron stars 62 neutron star 62 GRBs 62 interferometry 62 gravitational lensing 61 spacetime 61 excitons 61 galaxy clusters 61 gamma ray bursts 60 gamma ray burst 60 astrophysical 60 redshift 60 anisotropy 60 ionized gas 60 cosmic ray 60 neutrino 60 isotropic 60 Bose Einstein condensate 60 gamma ray 60 infrared radiation 60 positron 60 supernova explosions 60 phonons 60 interstellar medium 59 radiative 59 magnetic fields 59 magnetic flux 59 photons 59 electron 59 photon 59 accreting 59 distant galaxies 59 muon 58 WIMPs 58 auroral 58 pulsations 58 cosmic rays 58 elliptical galaxies 58 quark gluon plasma 58 Earth magnetosphere 58 cosmic microwave background 58 supermassive black hole 58 magnetosphere 58 galaxies 58 galaxy cluster 57 electron beams 57 superfluid 57 neutrinos 57 supernova explosion 57 spectroscopic 57 electrons 57 anisotropic 57 supermassive black holes 57 subatomic particles 57 dynamical 57 positrons 57 atomic nuclei 57 supernovas 57 CMEs 57 dwarf galaxy 57 Eta Carinae 56 laser pulses 56 GeV 56 aerosol particles 56 amplitudes 56 angular momentum 56 pulsar 56 X ray Observatory 56 photonic crystal 56 neutrons 56 z = 56 XMM Newton 56 gravitational 56 magnetization 56 water vapor 56 nucleation 55 quantum gravity 55 brown dwarfs 55 vibrational 55 ionization 55 WMAP 55 general relativity 55 vortices 55 ions 55 supernova 55 astronomical objects 55 laser pulse 55 distant galaxy 55 HD #b [002] 55 ionizing 55 proton