Related by context. Frequent words. (Click for all words.) 56 Lunine 54 Hawking radiation 54 Filippenko 54 Cosmologists 54 cosmological constant 54 gravitational lensing 54 Einstein theory 53 WMAP 53 general relativity 51 galaxy clusters 51 Hubble observations 51 NASA Chandra 50 Einstein theories 50 Higgs particle 50 X ray Observatory 50 quantum gravity 50 Bahcall 49 HD #b [002] 49 elliptical galaxies 49 spacetime 49 WASP #b 49 GRBs 49 cosmologists 49 superlens 49 SIRTF 49 Extraterrestrial Physics 49 cosmic microwave background 49 quasars 49 planetary geologist 49 Robock 49 astrophysicist 48 Type Ia supernovae 48 planetary scientist 48 numerical simulations 48 superfluidity 48 Rignot 48 supernovas 48 Changizi 48 negative refraction 48 quantum theory 48 supernova explosion 48 A'Hearn 47 Crutzen 47 Niels Bohr Institute 47 Keck telescope 47 magnetars 47 Maskawa 47 JILA 47 astrophysical 47 photoelectric effect 47 quark gluon plasma 47 gravitational waves 47 gravitational lens 47 Gehrels 47 quantum optics 47 supersymmetry 47 Earthlike 47 Pasachoff 47 supernovae 47 Xiang Zhang 47 Alfred McEwen 46 Planetary Laboratory 46 Nicolelis 46 Deisseroth 46 magnetar 46 protoplanetary disk 46 Crab Nebula 46 galaxy formation 46 heavily cratered 46 Kavli Institute 46 interplanetary spacecraft 46 Big Bang theory 46 Keck Observatory 46 high temperature superconductivity 46 astronomical observations 46 Astrophysical Journal 46 Brownian motion 46 CfA 46 cosmology 46 radial velocity 46 Cassini scientist 46 active galactic nuclei 46 elementary particle physics 45 frequency comb 45 IceCube 45 Paul Dirac 45 supernova explosions 45 Astrophysicist 45 astronomer 45 God Particle 45 PALCA 45 Edwin Hubble 45 planetary nebulae 45 Astrophysicists 45 XMM Newton 45 Harvard Smithsonian 45 maser 45 rocky planets 45 microlensing 45 Hakonarson 45 Haidt