Related by context. Frequent words. (Click for all words.) 57 magnetic reconnection 57 auroral 56 electron density 56 substorm 55 Kuiper belt 55 spatial scales 54 tropopause 54 solar corona 54 magnetosphere 54 photosphere 54 Earth magnetosphere 54 Oort Cloud 53 heliosheath 53 infrared wavelength 52 mesosphere 52 dipoles 51 X ray emission 51 upper troposphere 51 exosphere 51 substorms 51 primary visual cortex 51 isotropic 51 tropospheric 50 polar vortex 50 anisotropy 50 electron spins 50 photonic crystal 50 protoplanetary disk 50 morphologies 50 amplitudes 50 planetesimals 50 perturbations 50 exciton 50 mid latitudes 49 interferometric 49 laser pulse 49 decoherence 49 solar nebula 49 moonlets 49 planetary nebulae 49 optical wavelengths 49 lithosphere 49 Carina Nebula 49 electrically conducting 49 nuclei 49 cryosphere 49 heliosphere 49 excitations 49 attosecond 49 biogeochemical 49 ultraviolet wavelengths 49 aerosol particles 49 metastable 49 imaged 49 moon Enceladus 49 optical lattice 48 isotope ratios 48 hydrothermal vent 48 clathrates 48 troposphere 48 submicroscopic 48 spatial dimensions 48 insolation 48 micrometres 48 icy moons 48 dispersive 48 rubidium atoms 48 equatorial regions 48 metamorphism 48 Saturn moon Enceladus 48 Andromeda galaxy 48 magnetization 48 oscillatory 48 oscillation 48 Cosmic rays 48 heavily cratered 48 volcanically active 48 landmasses 48 visible wavelengths 48 Valles Marineris 47 stellar nurseries 47 MARSIS 47 Gamma rays 47 particle detectors 47 angstroms 47 Supplementary Fig 47 wavelengths 47 diffraction pattern 47 Mimas 47 gravity anomalies 47 ionosphere 47 spacetime 47 ITCZ 47 observable universe 47 latitudinal 47 VIRTIS 47 deformation 47 ellipsoid 47 Orion Nebula 47 ionised 47 distant galaxies