Related by context. Frequent words. (Click for all words.) 64 heliosphere 61 gravitational 60 Earth magnetosphere 60 magnetosphere 59 magnetic reconnection 58 magnetic fields 57 magnetic flux 56 interstellar medium 56 spacetime 55 magnetic 55 Kuiper belt 54 heliosheath 54 solar corona 54 accretion disk 54 ecliptic 53 auroral 53 geomagnetic 53 X ray emission 53 anisotropy 53 crystal lattice 53 gravitational waves 52 galaxy formation 52 ionized gas 52 plasmons 52 torus 52 gravitational attraction 52 magnetar 52 interstellar dust 52 magnetization 52 vortices 52 atomic nucleus 52 quantum gravity 52 celestial bodies 52 dynamical 51 substorms 51 ejecta 51 observable universe 51 planetary nebulae 51 galaxy clusters 51 outer planets 51 nebula 51 gravitationally 51 supernova explosions 51 ellipse 51 gravitational lensing 51 ionosphere 50 Milky Way Galaxy 50 Saturn rings 50 planets 50 gravitation 50 terrestrial planets 50 dipole 50 solar nebula 50 gravitational wave 50 comet nucleus 50 cosmic rays 50 visible wavelengths 49 aerosol particles 49 hydrological cycle 49 oscillations 49 equatorial 49 landforms 49 high temperature superconductivity 49 photonic crystal 49 astronomical objects 49 astrophysical 49 electromagnetic 49 Hubble observations 49 galaxies 49 continental crust 49 supernova remnants 49 lithosphere 49 globular clusters 49 interstellar space 48 subatomic particle 48 Computer simulations 48 Cabeus crater 48 Voyager spacecraft 48 nuclei 48 Andromeda galaxy 48 Itokawa 48 auroras 48 bilayer 48 occultation 48 interplanetary spacecraft 48 Mimas 48 cosmic ray 48 microtubules 48 microlensing 48 GRBs 48 ITCZ 48 habitable planets 48 exciton 48 dwarf galaxy 48 alien civilizations 48 filaments 48 supernova explosion 48 Crab Nebula 48 convective 48 cometary 48 antiprotons