Related by context. Frequent words. (Click for all words.) 59 Gamma rays 58 photoluminescence 58 stimulated emission 56 substorm 56 decoherence 56 quadrupole 55 isotropic 55 subatomic particle 55 dispersive 55 solar corona 55 phonon 55 magnetic reconnection 55 Gamma ray bursts 55 optical wavelengths 54 terahertz radiation 54 diffraction pattern 54 anisotropy 54 excitations 54 X ray emission 54 coronal hole 54 amplitudes 54 nonlinearity 54 ionisation 54 shorter wavelengths 53 interferometry 53 exciton 53 phonons 53 Solar flares 53 picoseconds 53 visible wavelengths 53 magnetic fields 53 planetesimals 53 ultraviolet wavelengths 53 electron density 53 redshifts 52 directivity 52 cosmic ray 52 interferometers 52 microwave frequencies 52 resonant frequency 52 photonic crystal 52 cosmic rays 52 interplanetary spacecraft 52 photometry 52 photons 52 interferometric 52 magnetization 52 excitons 52 antiprotons 52 polar vortex 52 heliosheath 52 morphologies 51 solar nebula 51 entropic 51 frequency modulation 51 oscillations 51 ionized gas 51 radiative 51 quantum mechanical 51 absorbance 51 adiabatic 51 transduction 51 Brownian motion 51 excitation 51 impedances 51 planetary nebulae 51 cosmic microwave background 51 photon 51 diffraction 51 interstellar medium 51 elemental composition 51 protostar 50 oscillation 50 photodetector 50 ultrafast 50 gamma rays 50 interstellar dust 50 ionize 50 femtosecond 50 oscillatory 50 subatomic particles 50 redshift 50 beam splitter 50 plasmonic 50 electrons 50 perturbation 50 photometer 50 Photons 50 picosecond 50 cuprates 50 gravitational waves 50 sideband 50 perihelion 50 spectra 50 tropospheric 50 relativistic 50 microwave radiation 50 vibrational 50 spacetime 50 nuclei 50 gravitational wave