Related by context. Frequent words. (Click for all words.) 63 Cepheids 62 galaxy formation 62 solar nebula 60 dynamical 59 circular orbits 59 diffraction pattern 59 elliptical galaxies 58 morphologies 58 cosmological 58 radioactive decay 58 planetary nebulae 58 redshifts 58 protoplanetary disk 58 Type Ia supernovae 58 supernova explosions 57 protostars 57 protostar 57 atomic nuclei 57 Cosmologists 57 magnetars 57 stellar nurseries 57 WASP #b 57 planetary nebula 57 supernova remnants 57 planetesimals 57 baryons 57 active galactic nuclei 57 optical wavelengths 57 hydrogen helium 56 excitations 56 Brownian motion 56 planets 56 elemental composition 56 isotopic composition 56 globular cluster 56 supernova explosion 56 numerical simulations 56 electron spins 56 X ray emission 56 observable universe 56 antiprotons 56 Carina Nebula 56 astrophysical 55 bosons 55 radial velocity 55 singularities 55 GRBs 55 prokaryotes 55 spacetime 55 nanomechanical 55 spiral galaxies 55 chirality 55 ejecta 55 subatomic 55 galaxy NGC 55 gravitational attraction 55 anisotropy 54 oxygen isotopes 54 superlens 54 noble gases 54 exosphere 54 spectroscopic 54 Kuiper belt 54 quanta 54 supernovae 54 decoherence 54 macroscopic 54 interferometers 54 atomistic 54 fermions 54 Computer simulations 54 electron density 54 galaxy clusters 54 macromolecular 54 tropospheric 54 planetary 54 magnetization 54 subatomic particle 54 Einstein theories 54 spectra 54 neutron stars 54 photometry 54 dwarf galaxy 54 accretion disk 54 abundances 54 submicroscopic 54 galaxies 54 Bose Einstein condensate 54 novae 54 atomic nucleus 54 magnetic reconnection 54 solar corona 54 isotope ratios 54 radiative 54 Hubble observations 53 tetrahedral 53 globular clusters 53 magnetar 53 noctilucent clouds 53 terrestrial planets 53 substorm