Related by context. Frequent words. (Click for all words.) 64 radial velocity 61 photoluminescence 61 galaxy formation 60 photosphere 60 gravitational lensing 60 substorm 59 elemental composition 59 Cepheids 58 protoplanetary disk 58 X ray emission 57 active galactic nuclei 57 ultraviolet wavelengths 57 microlensing 57 pulsations 57 aurorae 57 WASP #b 57 interferometry 57 astrophysical 57 plasmon 57 magnetar 56 elliptical galaxies 56 Type Ia supernovae 56 planetary nebulae 56 planets circling 56 noctilucent clouds 55 magnetic fields 55 magnetic reconnection 55 numerical simulations 55 gravitational lens 55 quantum optics 55 nanomechanical 55 scanning tunneling microscope 55 stellar nurseries 55 auroral 55 protostars 55 diffraction pattern 55 oscillatory 55 Hubble observations 55 Computer simulations 55 infrared spectroscopy 55 Gamma ray bursts 55 Keck telescope 54 decoherence 54 Earth magnetosphere 54 optical wavelengths 54 supernova remnants 54 subatomic particle 54 Astrophysicists 54 planet orbits 54 nanosized 54 tropospheric 54 magnetars 54 Galaxy Evolution 54 Hawking radiation 54 high temperature superconductivity 54 GRBs 54 ionosphere 54 cosmic microwave background 54 solar corona 54 biomolecule 54 novae 54 protostar 54 meteorite impacts 53 XMM Newton 53 superlens 53 microwave radiation 53 orbiting planets 53 numerical modeling 53 abundances 53 phosphorescence 53 photometric 53 neutron scattering 53 photometry 53 biogeochemical 53 photometer 53 exciton 53 semiconductor nanocrystals 53 anisotropic 53 Einstein theories 53 supernova explosion 53 extrasolar planet 53 magnetic flux 53 distant galaxies 53 phonons 52 supernovas 52 auroras 52 fluorescing 52 surface plasmons 52 Supernovae 52 polar vortex 52 astronomical observations 52 excitations 52 high temperature superconductors 52 electron spins 52 cosmic rays 52 osmium 52 scanning electron microscopy 52 Brownian motion 52 radioactive decay 52 spectroscopic 52 quantum mechanical