Related by context. Frequent words. (Click for all words.) 49 Copernicus 46 Johannes Kepler 45 Tutankhamen 45 Lutetia 45 Oetzi 44 Heisenberg 43 astronomers 42 comet Wild 42 globular clusters 42 Saturn moons 42 Galileo Galilei 41 Tut 41 Saturn rings 41 Richard Feynman 40 Leibniz 40 comet nucleus 40 Feynman 40 Kepler 40 Cassini Huygens 40 Egyptologists 40 Tutankhamun 39 King Tut 39 Eta Carinae 39 Einstein theory 39 Einstein 39 Friedrich Nietzsche 39 Sigmund Freud 39 Huygens 39 Solar System 39 Tsar Nicholas II 39 comets 38 Enceladus 38 comet 38 astronomical observations 38 ExoMars 38 royal lineage 38 XMM Newton 37 distant galaxies 37 Gagarin 37 Edward Teller 37 Kierkegaard 37 Pythagoras 37 cometary 37 Lyuba 37 Jupiter moons 37 Mars 37 Kuiper Belt 37 Giotto 37 outer planets 37 cosmologists 37 Louis Pasteur 37 cosmological constant 36 supernova explosion 36 radiocarbon dating 36 interstellar dust 36 Ramses II 36 brown dwarf 36 quasars 36 Akhenaten 36 Egyptian mummies 36 orbiting telescope 36 Planck 36 astrophysical 36 WMAP 36 tomb 36 Astronomers 36 Cassini 35 Corot 35 elliptical galaxies 35 Rembrandt 35 supernova 35 quantum theory 35 Carl Sagan 35 general relativity 35 pharaoh 35 rocky planets 35 quantum mechanics 35 Ptolemy 35 GRBs 35 Spinoza 35 mammoths 35 Galileo 35 spectroscopic 35 astronomer 35 Egyptology 35 Leonardo da Vinci 34 Albert Einstein 34 UB# [003] 34 exhumed 34 Leonardo Da Vinci 34 astrophysicists 34 Phar Lap 34 dwarf galaxy 34 Nikola Tesla 34 ESO Very Large Telescope 34 Holbein 34 mummification 34 palaeontologists 34 Hubble 34 IceCube 34 Amenhotep III