Related by context. Frequent words. (Click for all words.) 71 radial velocity 62 Galaxy Evolution 62 Cepheids 62 microlensing 61 Keck telescope 60 lunar craters 60 WASP #b 60 VIRTIS 60 astronomical telescope 60 photometry 59 interplanetary spacecraft 59 interferometric 59 coronagraph 58 gravitational lensing 58 Type Ia supernovae 58 planetary nebulae 58 extrasolar planet 58 gravitational lens 58 particle detectors 58 VLBI 57 Diviner 57 Mauna Kea Hawaii 57 planet Uranus 57 TrES 57 plasmon 57 noctilucent clouds 57 moon Enceladus 57 icy moons 57 extrasolar planets 57 photometer 57 Galileo spacecraft 57 Mass spectrometry 57 ESO Very Large Telescope 57 HD #b [002] 57 XMM Newton 56 active galactic nuclei 56 exoplanets 56 COROT 56 astronomical observations 56 WM Keck Observatory 56 particle detector 56 geoid 56 magnetars 56 supercomputer simulations 56 Jupiter moons 56 interferometers 56 exosphere 55 aurorae 55 Very Large Telescope 55 Viking landers 55 planets 55 Keck Observatory 55 Cassini Huygens 55 Cancri 55 planets orbiting 55 metallicity 55 Gamma ray bursts 55 photosphere 55 Astrophysicists 55 planet orbits 55 interstellar clouds 55 electron spins 55 LOFAR 55 numerical simulations 55 stellar nurseries 55 Exoplanet 55 SIRTF 55 optical biosensors 55 spectrographs 55 Spitzer Space Telescope 55 gravitational wave 55 subatomic particle 55 Kepler spacecraft 55 boson 55 photoluminescence 54 exoplanet 54 redshifts 54 interferometry 54 spectroscopic 54 Mini SAR 54 ultracold 54 Hubble observations 54 IceCube 54 habitable planets 54 HAT P 54 planetary 54 ionisation 54 magnetic fields 54 distant galaxy 54 OGLE 54 quantum entanglement 54 extraterrestrial civilizations 54 optical wavelengths 54 protostars 54 solar corona 54 InSAR 54 Voyager spacecraft 53 potentially habitable 53 Gliese #g 53 orbiting planets 53 Oort cloud