Related by context. Frequent words. (Click for all words.) 65 radial velocity 60 photometry 59 interferometer 59 Hubble observations 58 interferometry 58 elemental composition 57 infrared spectroscopy 57 interferometers 56 spectrographs 56 spectroscopic 55 astronomical observations 55 spectrometry 55 microlensing 55 quantitative measurements 55 frequency comb 55 FRET 55 gravitational lensing 55 photometer 54 Spectrometer 54 stable isotope 54 CALIPSO 54 VLBI 54 X ray diffraction 54 Raman spectroscopy 54 measurements 54 redshifts 54 HARPS 54 optical microscopy 54 optical wavelengths 54 isotopic 53 crystallographic 53 XMM Newton 53 SQUID 53 spectra 53 numerical simulations 53 transmission electron microscopy 53 planetary nebulae 53 spectroscopy 53 gel electrophoresis 53 Cepheids 53 adaptive optics 53 gravitational wave 52 electron density 52 ion mobility 52 Mauna Kea Hawaii 52 exciton 52 optical microscope 52 redshift 52 antiprotons 52 transmission electron microscope 52 WMAP 52 COROT 51 neutron scattering 51 photometric 51 ESO Very Large Telescope 51 diffraction 51 radiometer 51 z = 51 atmospheric turbulence 51 scanning tunneling microscope 51 ionisation 51 dynamical 51 Gaussian 51 wavefront 51 gas chromatograph 51 Garching Germany 51 spectrometer 51 attosecond 50 MARSIS 50 JILA 50 ionospheric 50 sensor arrays 50 spectral 50 NICMOS 50 ultrasensitive 50 laser pulses 50 bilayer 50 lidar 50 EPOXI 50 Higgs particle 50 x ray crystallography 50 NASA Cassini 50 nanomechanical 49 isotropic 49 planets circling 49 mass spectroscopy 49 computational methods 49 Mini SAR 49 Keck Observatory 49 electron spins 49 Nuclear Magnetic Resonance 49 positron 49 HRSC 49 muon 49 anisotropy 49 shorter wavelengths 49 infrared mapping spectrometer 49 X ray crystallography 49 neutrino 49 analyte 49 OGLE