Related by context. Frequent words. (Click for all words.) 61 GRB # 60 galaxy cluster 60 Andromeda galaxy 59 distant galaxy 59 Galaxy Evolution 58 microlensing 57 X ray emission 57 COROT 57 Orion Nebula 57 XMM Newton 57 dwarf galaxy 56 supernova remnants 56 HD #b [002] 56 planet orbiting 56 supernova explosion 55 Andromeda Galaxy 55 magnetar 55 celestial object 55 colliding galaxies 54 spacecraft orbiting 54 elliptical galaxies 54 Hubble observations 54 Voyager spacecraft 54 Crab Nebula 54 GRBs 54 auroral 54 solar corona 54 Eta Carinae 54 accretion disk 53 NASA Cassini spacecraft 53 Gamma ray bursts 53 OGLE 53 Gliese #g 53 planetary nebulae 53 magnetic reconnection 53 gamma ray burst 52 gravitational waves 52 extrasolar planet 52 quasars 52 astronomical objects 52 Iapetus 52 galaxy formation 52 orbiting Saturn 52 X ray Observatory 52 NASA Chandra 52 ejecta 52 meteoroid 52 occultation 52 gravitational wave 51 Cancri 51 planetary nebula 51 planet orbits 51 Saturn moon Enceladus 51 WM Keck Observatory 51 MODIS 51 WIMPs 51 moon Charon 51 supernova remnant 51 Type Ia supernovae 51 Saturn moons 51 NASA ESA Hubble 51 comet nucleus 51 redshift 51 galaxy clusters 50 Spitzer Space Telescope 50 brown dwarf 50 Algol 50 unaided eye 50 planets orbiting 50 planets circling 50 interstellar dust 50 globular clusters 50 accreting 50 supernova 50 cometary 50 supermassive black hole 50 NASA Kepler 50 Kuiper belt 50 spiral galaxies 50 infrared telescope 50 astronomers 50 Jupiter moons 50 galaxies 50 Global Surveyor 50 brown dwarfs 50 Betelgeuse 50 Comet McNaught 50 Large Magellanic Cloud 49 Monthly Notices 49 globular cluster 49 GRB 49 ESO Very Large Telescope 49 spectroscopic 49 extrasolar planets 49 Astrophysicists 49 supernovae 49 neutron star 49 rocky planets 49 gamma ray 49 z = 49 solar nebula