Related by context. Frequent words. (Click for all words.) 66 ESO Very Large Telescope 66 XMM Newton 65 spectrographs 63 Very Large Telescope 63 WFC3 62 spectroscopic 61 radial velocity 61 NICMOS 61 interferometer 59 photometer 59 gravitational lensing 59 Cosmic Origins Spectrograph 59 Cepheids 59 infrared wavelengths 59 visible wavelengths 59 photometry 59 microlensing 58 COROT 58 Spectrometer 58 interferometers 58 adaptive optics 58 NASA ESA Hubble 58 optical wavelengths 58 keV 58 La Silla Chile 58 multispectral 58 spatial resolution 58 redshift 57 SMOS 57 OSIRIS 57 frequency comb 57 redshifts 57 interferometry 57 Mini SAR 57 Spectroscopy 57 VLBA 56 STIS 56 spectroscopy 56 solar corona 56 attosecond 56 MARSIS 56 near infrared NIR 56 photometric 56 Hubble observations 56 NASA Cassini spacecraft 56 HiRISE camera 56 ionospheric 56 confocal microscopy 56 HRSC 56 spacecraft orbiting 56 Remote sensing 55 Galaxy Evolution 55 radiometer 55 VLBI 55 cosmic microwave background 55 confocal 55 CALIPSO 55 ESA Mars 55 THEMIS 55 photonic crystal 55 occultation 55 irradiance 54 Raman spectroscopy 54 transmission electron microscope 54 infrared 54 extrasolar planet 54 planetary nebulae 54 spectra 54 collimator 54 FRET 54 SPIRE 54 infrared spectroscopy 54 Fluorescence 54 X ray emission 54 star Gliese 54 optical telescopes 54 optical microscopy 54 fluorophores 54 gravitational wave 54 MetOp 54 NASA Chandra 54 spectrometer 54 anisotropy 54 Thermal Emission Imaging 54 absorbance 54 EPOXI 54 isotropic 54 Spitzer Space Telescope 54 ICESat 53 European Synchrotron Radiation 53 distant galaxies 53 comet nucleus 53 interplanetary spacecraft 53 femtosecond 53 galaxy formation 53 CIRS 53 GOCE 53 Cassini orbiter 53 neutron scattering 53 spectrometry 53 CloudSat