Related by context. Frequent words. (Click for all words.) 54 spacetime 53 anisotropy 51 isotropic 51 Hawking radiation 51 collimator 50 elemental composition 50 wavefront 49 Crab Nebula 49 tropospheric 49 photometry 49 interferometry 49 radial velocity 49 geoid 49 logarithm 49 parallax 48 angular momentum 48 singularities 48 electron spins 48 X ray emission 47 photonic crystal 47 superimposition 47 galaxy formation 47 HiRISE camera 47 solar corona 47 shorter wavelengths 47 Newtonian physics 47 Einstein theory 47 spherical 47 accretion disk 47 electron density 47 geocentric 46 dynamical 46 photometer 46 quantization 46 interferometric 46 gravitational lensing 46 compensator 46 kinematic 46 quantum gravity 46 magnetization 45 spatial dimensions 45 magnetar 45 magnetic flux 45 quantized 45 Hubble observations 45 quanta 45 positron 45 planet Uranus 45 planetary nebula 45 fluorescing 45 GPa 45 supernova explosion 45 radiative 45 comet tail 45 Cepheids 45 z = 45 Gravitational 45 quantum entanglement 45 morphologies 45 electromagnetic induction 45 diffractive 45 ionized gas 45 photoluminescence 45 parameterization 45 ultraviolet wavelengths 45 kelvin 45 nebula 45 geometry 45 lunar soil 45 solar nebula 44 protoplanetary disk 44 nonlinearity 44 interferometers 44 Fig. 1A 44 baryons 44 binary 44 logarithmic 44 toroidal 44 gravitational 44 exciton 44 visible wavelengths 44 dipoles 44 WASP #b 44 spectroscopic 44 cosmological 44 general relativity 44 quasar 44 magnifying lens 44 Einstein Theory 44 magnifications 44 redshifts 44 excitations 44 GRB # 44 velocities 44 Bose Einstein condensate 44 galaxy cluster 44 Brownian motion 44 surface roughness 44 spectrographs 43 hemispherical 43 E = mc