Related by context. Frequent words. (Click for all words.) 65 spectroscopic 64 spectral 63 wavelengths 62 redshift 62 amplitudes 61 spectroscopy 60 infrared wavelengths 59 XMM Newton 59 spatial resolution 59 wavelength 58 diffraction 58 magnetization 58 fluorescence 58 galaxy clusters 57 interferometer 57 excitation 57 isotopic 57 distant galaxies 56 laser pulses 56 quasars 55 quasar 55 elliptical galaxies 55 reflectance 55 atoms 55 nuclei 55 galaxy cluster 54 abundances 54 GRBs 54 photons 54 spectrometer 54 supernovae 54 interstellar dust 54 galaxies 54 hydrogen atoms 54 conductance 53 Raman spectroscopy 53 X ray diffraction 53 μm 53 velocities 53 gamma ray 53 spectrometers 53 fluxes 53 measurements 53 radii 53 radiometric 52 WMAP 52 gravitational lensing 52 laser pulse 52 intensities 52 HD #b [002] 52 infrared 52 magnetic fields 51 micrometer 51 Fluorescence 51 planets orbiting 51 GRB 51 particle 51 optical telescopes 51 microscopy 51 oscillations 51 CCD camera 51 femtosecond 51 infrared radiation 51 coefficients 51 hydroxyl 51 interstellar medium 51 gamma ray bursts 51 brown dwarfs 51 exoplanet 51 waveforms 51 gamma rays 51 planet orbiting 51 genomic DNA 51 globular clusters 51 photon 51 Spectrometer 50 cosmic microwave background 50 extrasolar planet 50 deuterium 50 dynamical 50 pulsar 50 optical microscope 50 luminosity 50 analytes 50 exoplanets 50 amplitude 50 nebulae 50 hydrogen atom 50 nanocrystals 49 photodiodes 49 electron microscopy 49 THz 49 neutrons 49 dwarf galaxies 49 extrasolar planets 49 supernova explosion 49 gamma ray burst 49 transcriptome 49 nebula 49 surface roughness 49 neutrino