Related by context. Frequent words. (Click for all words.) 70 Extraterrestrial Intelligence 57 Neil deGrasse Tyson 55 SETI Institute 53 NASA Kepler 52 SETI 52 alien civilizations 50 LCROSS mission 49 planetary missions 49 habitable planets 48 moon Europa 48 astrobiologists 48 planetary scientist 48 Michael Shermer 48 Astrobiology 47 Bad Astronomy 47 astrobiology 47 Carolyn Porco 47 Kavli Institute 47 NASAs 47 Gliese #g 47 extraterrestrials 46 JPL manages 46 Thirty Meter Telescope 46 Extraterrestrials 46 HD #b [002] 46 Carl Sagan 46 Astrophysicist 46 extraterrestrial 46 Alfred McEwen 45 SETI @ home 45 Cassini Huygens 45 particle physicist 45 COROT 45 extrasolar planet 45 SkyScout 45 Melosh 45 Stephen Wolfram 45 MAVEN 44 Lowell Observatory 44 Planetary Society 44 artificial photosynthesis 44 G Madhavan Nair 44 planetary science 44 NASA Astrobiology Institute 44 James Lovelock 44 habitable planet 44 interplanetary spacecraft 44 substorms 44 solar corona 43 Jean Jacques Dordain 43 EIAST 43 astronomer 43 Richard Feynman 43 extrasolar planets 43 GLAST 43 Allen Telescope Array 43 Schulze Makuch 43 Astronomy 43 Mark Serreze 43 astrobiologist 43 Pan STARRS 43 Cosmology 43 LCROSS 43 Planetary Science 43 Planetary Laboratory 43 Nehru Planetarium 42 distant galaxy 42 Hayden Planetarium 42 IBM Almaden Research 42 planetary exploration 42 journal Astronomy 42 theoretical physicist 42 Oceanographer 42 Phil Plait 42 LIGO 42 La Silla Chile 42 Justin Rattner 42 particle physicists 42 celestial object 42 Arecibo Observatory 42 G. Madhavan Nair 42 IceCube 42 Garching Germany 42 optical telescopes 42 planetoid 42 DUSEL 42 Anthony Colaprete 42 Astrophysics 42 Astronomer 41 astronomer Carl Sagan 41 NASA Cassini 41 Earth asteroids 41 Keck Observatory 41 Jet Propulsion Lab 41 gravitational waves 41 astrophysicist 41 observatory 41 Abominable Snowman 41 moon Charon 41 NASA Ames 41 Kepler telescope