Related by context. Frequent words. (Click for all words.) 63 Alpha Magnetic Spectrometer 61 optical telescope 60 interplanetary spacecraft 59 IceCube 59 COROT 58 infrared telescope 57 beamline 57 telescope 57 Cassini Huygens 56 particle accelerator 56 X ray telescope 55 Very Large Telescope 55 orbiting 55 interferometer 55 THEMIS 55 Spectrometer 55 microlensing 55 National Ignition Facility 55 optical telescopes 54 particle collisions 54 Space Agency 54 JWST 53 Large Hadron Collider LHC 53 OSIRIS 53 ESO Very Large Telescope 53 spectrometer 53 spectrograph 53 WM Keck Observatory 53 LIGO 53 cosmic ray 52 orbiting telescope 52 synchrotron radiation 52 optical microscope 52 lunar soil 52 transmission electron microscope 52 SELENE 52 ExoMars 52 GLAST 52 MARSIS 51 Advanced Photon Source 51 spacecraft 51 NASA Kepler 51 robotic spacecraft 51 GeV 51 extrasolar planet 51 gravitational wave 51 Jet Propulsion Laboratory JPL 51 collider 51 orbiting Saturn 51 Stardust spacecraft 51 scanning tunneling microscope 51 imager 51 Orbiting Carbon Observatory 51 CALIPSO 51 synchrotron 50 orbiting observatory 50 galaxy cluster 50 Arecibo Observatory 50 solar arrays 50 astronomical observatory 50 adaptive optics 50 New Horizons spacecraft 50 spectroscopic 50 HD #b [002] 50 XMM Newton 50 Applied Physics Laboratory 50 LCLS 50 geosynchronous orbit 50 OGLE 50 liquid helium 50 Gemini Observatory 50 CubeSat 50 subatomic particle 50 muon 50 orbital outpost 50 radiometer 50 thruster 50 spectrometers 49 fusion reactor 49 telescopes 49 Discovery payload bay 49 LCROSS 49 ringed planet 49 atom smasher 49 orbiting outpost 49 Lunar Reconnaissance Orbiter 49 astronomical observations 49 particle accelerators 49 meteoroid 49 antiprotons 49 Thirty Meter Telescope 49 lunar orbiter 49 Spallation Neutron Source 48 NASA Chandra 48 X ray Observatory 48 International Space Station 48 mass spectrometer 48 particle collider 48 detector 48 NICMOS 48 astronomers