Related by context. Frequent words. (Click for all words.) 64 luminescence 64 iridescence 57 fluorescence 56 X ray emission 56 Crab Nebula 55 ultraviolet light 55 bioluminescence 55 luminescent 55 fluoresce 54 luminosity 54 phosphors 53 phosphorescent 53 fluorescent dye 53 quantum dots 53 reddish color 52 fluorescent proteins 52 bioluminescent 52 brightness 52 interstellar dust 52 auroras 52 dinoflagellates 51 luminous 51 chlorophyll 51 nacre 51 iridescent 51 myoglobin 51 nebulae 51 auroral 51 chemical composition 50 Quantum dots 50 aerosol particles 50 crystals 50 crystalline 50 FRET 50 golden hue 50 nanocrystals 50 laser pulse 50 silicates 50 superfluidity 50 accretion disk 49 light emitting 49 nanoparticles 49 XMM Newton 49 ionized gas 49 glow 49 starlight 49 abundances 49 interstellar medium 49 nanodiamonds 49 ionized 49 infrared wavelengths 49 quantum dot 49 ejecta 48 radiance 48 X ray beam 48 quark gluon plasma 48 supernovas 48 photonic crystals 48 silicate 48 striations 48 supernovae 48 Fluorescence 48 pineal gland 48 colloidal 48 starbursts 48 gravitational lensing 48 orange hue 48 iron oxides 48 sunlight 48 nano particles 48 fluorescent 48 HD #b [002] 48 extrasolar planets 47 Brownian motion 47 GRBs 47 supernova explosions 47 conductivity 47 SWNTs 47 yellowish 47 nanorods 47 coloration 47 nebula 47 organic molecules 47 magnetic fields 47 supernova 47 iridium 47 unaided eye 47 spectroscopic 47 phosphor 47 excitons 47 hydrothermal vents 47 supernova explosion 47 filament 47 shimmer 47 quasar 47 quasars 47 pigment 47 photons 47 chloroplasts 47 Eta Carinae 47 comet