Related by context. Frequent words. (Click for all words.) 52 gravitational 52 Authorship means 50 gravitational tug 50 protoplanetary disk 50 atomic nucleus 50 Alec Hogg Alec Hogg 50 star Gliese 50 supernova explosion 49 WASP #b 49 solar nebula 49 exosphere 49 photosphere 49 CoRoT 7b 49 Paul Dirac 48 interstellar clouds 48 X ray emission 48 magnetosphere 48 magnetar 47 Brownian motion 47 Kathy Patalsky 47 Toutatis 47 heliosphere 47 gravitational interactions 47 accretion disk 47 mesosphere 46 gravitational attraction 46 planet orbiting 46 Earth magnetosphere 46 Jupiter Saturn Uranus 46 gravitational lens 46 Oort cloud 46 Einstein theory 46 antiparticles 46 By Kimberly Nordyke 46 Eagle Nebula 45 substorm 45 heliosheath 45 Hawking radiation 45 gravitational lensing 45 carbonate minerals 45 planet Uranus 45 photoelectric effect 45 spacetime 45 supernova explosions 45 innermost planet 45 Oort Cloud 45 gravitationally 45 NYSE IFF 45 neutron star 45 boson 45 cosmic microwave background 45 COROT 45 planetary nebulae 45 extrasolar 44 moon Enceladus 44 lithosphere 44 globular star 44 radioactive decay 44 subatomic particle 44 Large Magellanic Cloud 44 van der Waals 44 magnetars 44 globular cluster 44 GPa 44 superfluid 44 ionized gas 44 Andromeda galaxy 44 elliptical galaxy 44 planet orbits 44 nebulae 44 surface plasmons 44 protostar 44 atomic nuclei 44 rubidium atoms 44 cosmological constant 44 observable universe 44 baryons 44 photochemistry 44 interstellar dust 44 electromagnetism 44 red supergiant 43 Eta Carinae 43 Saturnian 43 galaxy NGC 43 gravitational pull 43 electrochemical reaction 43 ionised 43 terrestrial planets 43 meteorite impacts 43 spherical shape 43 Bose Einstein condensate 43 protoplanetary disks 43 antigravity 43 supersymmetry 43 Gamma rays 43 icy moons 43 solar corona 43 Hubble observations 43 quantum mechanical 43 Edwin Hubble 43 excitations