Related by context. Frequent words. (Click for all words.) 60 #/#Z 58 sunspot 52 X ray emission 51 auroral 50 electron density 50 Sunspot 49 Fig. 1A 49 planetary nebula 49 galaxy cluster 48 anisotropy 48 keV 48 supernova remnant 48 polar vortex 47 Sunspots 47 planetary nebulae 47 dwarf galaxy 46 Kuiper belt 46 magnetar 46 GRB # 46 GeV 46 supernova remnants 46 moonlets 45 sunspots 45 Orion Nebula 45 poleward 45 spectrally 45 convective 45 magnetars 45 geomagnetic field 44 ionised 44 visible wavelengths 44 equatorial Pacific Ocean 44 baryons 44 supernova explosion 44 MeV 44 globular cluster 44 redshifts 44 constellation Leo 44 active galactic nuclei 44 IIb 44 ITCZ 43 Crab Nebula 43 mid latitudes 43 solar corona 43 equatorial 43 magnetic reconnection 43 nebula 43 Gamma rays 43 Cepheids 43 Gamma ray bursts 43 Galaxy Evolution 43 Large Magellanic Cloud 43 ionized gas 43 By Arek Sarkissian 43 XMM Newton 43 globular clusters 43 SSTs 43 corona 43 Kuiper Belt 43 unaided eye 43 elliptical galaxies 43 radiometric anomaly 43 Oort Cloud 42 cirrus 42 supercells 42 solar nebula 42 Andromeda Galaxy 42 accretion disk 42 planetesimals 42 interferometers 42 Fomalhaut 42 Kuiper Belt objects 42 femtoseconds 42 aurorae 42 quasar 42 constellation Perseus 42 epsilon 42 dwarf galaxies 42 star Gliese 41 NICMOS 41 supernovae 41 nebulae 41 photometry 41 atmospheric methane 41 torus 41 irradiance 41 Younger Dryas 41 photometer 41 radiative 41 ejecta 41 optical wavelengths 41 Hubble observations 41 Clin Infect Dis 41 #.#μm [001] 40 volcanic tremors 40 Earth magnetosphere 40 brown dwarfs 40 globular 40 aurora 40 galaxies 40 spectra