Related by context. Frequent words. (Click for all words.) 49 Credit NASA JPL 39 credit NASA JPL 38 JPL manages 37 STScI 35 A'Hearn 35 Astrophysicist 35 CfA 33 Jewitt 32 atmospheric sciences 31 Flyby 31 planetary scientist 31 Stardust NExT 31 NASA Cassini 30 Nasa Jet Propulsion 30 Socorro NM 30 Smithsonian Astrophysical Observatory 30 Des Marais 29 SwRI 29 Planetary Science 29 Lunar Prospector 29 Gehrels 28 Planck 28 Applied Physics Laboratory 28 Gurnett 28 spectrographs 28 principal investigator 27 National Optical Astronomy 27 infrared mapping spectrometer 27 NASAs 26 NASA Aqua 26 Planetary Laboratory 25 Astronomy 25 Scientist 25 EPOXI 25 Galaxy Evolution 25 SPACE.com 24 astrobiologist 24 Gemini Observatory 24 cosmic ray 24 planetary sciences 24 Cassini Huygens 24 Lowell Observatory 24 cryosphere 24 interstellar space 24 cometary 24 Astrobiology 23 infrared wavelengths 23 NASA Lunar Reconnaissance 23 optical telescope 23 ion propulsion 23 Sunspots 23 astronomer 23 NASA Jet Propulsion Laboratory 23 Cabeus 23 hypersonic flight 23 NASA Chandra 22 Spitzer Space Telescope 22 Solar System 22 celestial object 22 New Horizons spacecraft 22 infrared telescope 22 astrophysics 22 Science Mission Directorate 22 comet Hartley 2 21 planetary science 21 Titan Saturn 21 Comet McNaught 21 gravitational waves 21 moon Charon 21 solar corona 21 Cassini 21 planetary exploration 21 Earth asteroids 21 astronomical objects 20 interplanetary spacecraft 20 Regional Spaceport 20 Deep Impact mission 20 Planetary Sciences 20 Space Telescope 20 UP Aerospace 20 Messenger spacecraft 20 extrasolar planet 19 XMM Newton 19 Very Large Array 19 astrophysical 19 Gamma rays 19 NASA Cassini spacecraft 19 X ray telescope 19 Squyres 19 NASA 17 orbit insertion 17 Moon 16 Spaceport Authority 16 flyby 16 Mars orbiter 16 spacecraft orbiting 15 Agey 15 spacecraft 14 orbiting spacecraft 14 Earth orbit 14 Horizons