Related by context. Frequent words. (Click for all words.) 69 magnetic reconnection 68 X ray emission 67 magnetosphere 67 auroral 66 solar corona 66 Earth magnetosphere 63 dynamical 63 convective 63 interstellar medium 62 planetary nebulae 62 anisotropy 62 galaxy formation 61 ionized gas 61 cosmic ray 60 magnetic flux 60 heliosphere 60 accretion disk 60 solar nebula 60 active galactic nuclei 60 electron density 60 quasar 59 cosmic rays 59 astrophysical 59 substorms 59 heliosheath 59 magnetar 59 excitations 59 supernova remnants 59 XMM Newton 59 crustal 59 lithosphere 58 ejecta 58 occultation 58 ionosphere 58 vortices 58 supernova explosions 57 geomagnetic 57 spectroscopic 57 galaxy clusters 57 ionospheric 57 planetary nebula 57 superfluid 57 neutrino 57 radiative 57 Hubble observations 57 cometary 56 anisotropic 56 coronal 56 aurora 56 volcanism 56 innermost planet 56 supernova remnant 56 geomagnetic field 56 poleward 56 nuclei 56 Iapetus 56 galaxy cluster 55 gravitational wave 55 cosmic microwave background 55 supernova explosion 55 GRBs 55 Saturn rings 55 meteoroid 55 interferometry 55 nebulae 55 solar irradiance 55 troposphere 55 terrestrial planets 55 numerical simulations 55 Type Ia supernovae 55 aerosol particles 55 magmatic 55 meteoroids 55 interstellar dust 55 gravitational lensing 55 Jupiter Saturn 55 comet tail 55 gamma rays 55 gravitational attraction 55 CMEs 55 oscillations 55 planetary 55 dispersive 55 radioactive decay 55 pulsar 54 antiprotons 54 nebula 54 pulsations 54 Kuiper belt 54 magnetization 54 outer planets 54 atmospheric circulation 54 exciton 54 spacetime 54 Mimas 54 interplanetary spacecraft 54 Eta Carinae 54 corona 54 dimer 54 atmospheric 54 neutron star