Related by context. Frequent words. (Click for all words.) 65 WMAP 62 COBE 60 Mini SAR 60 XMM Newton 60 cosmic microwave background 60 Mauna Kea Hawaii 59 NASA Chandra 59 NASA Cassini spacecraft 58 solar corona 58 Galaxy Evolution 58 Gravity Recovery 57 X ray telescope 57 COROT 57 Hubble observations 57 Spitzer Space Telescope 57 MARSIS 57 WM Keck Observatory 57 radial velocity 56 SMOS 56 Kepler telescope 56 Cassini Huygens 56 spectroscopic 56 ESO Very Large Telescope 56 infrared telescope 56 particle detectors 56 Keck Observatory 56 spacecraft orbiting 56 X ray Observatory 56 NASA Kepler 56 microlensing 56 particle detector 56 Southern Observatory ESO 55 CRISM 55 active galactic nuclei 55 interplanetary spacecraft 55 La Silla Chile 55 gamma ray burst 55 Arecibo Observatory 55 astronomers 55 Astrophysical Journal Letters 55 Very Large Array 55 CloudSat 55 NASA Lunar Reconnaissance 54 cosmic ray 54 National Astronomical Observatory 54 WFC3 54 Astrophysicists 54 solar nebula 54 numerical simulations 54 astrophysicists 54 extrasolar planet 54 Lunar Prospector 54 Gemini Observatory 54 STScI 54 VLBA 54 interferometry 54 magnetic reconnection 54 astronomical observations 54 NASA ESA Hubble 54 galaxy formation 54 optical telescopes 54 gravitational lensing 54 NASA Mars Odyssey 54 VLBI 54 Voyager spacecraft 54 CALIPSO 54 Spectrometer 53 THEMIS 53 photometer 53 supernova remnant 53 WASP #b 53 multispectral 53 interstellar dust 53 redshift 53 LCROSS mission 53 NASAs 53 GRB # 53 NASA Cassini 53 Edwin Hubble 53 radar altimeter 53 cosmologists 53 galaxy clusters 53 NASA Goddard 52 Gravity Probe B 52 X ray emission 52 Astrophysicist 52 Chandra X ray 52 STIS 52 Remote sensing 52 ICESat 52 magnetar 52 polar vortex 52 Messenger spacecraft 52 quasars 52 attosecond 52 Very Large Telescope 52 planetary nebulae 52 galaxy cluster 52 Space Telescope 52 radiometer 52 infrared spectrometer