Related by context. Frequent words. (Click for all words.) 56 proton beams 53 trillion electron volts 52 electron volts 51 particle accelerator 51 Large Hadron Collider LHC 51 Large Hadron Collider 51 collider 50 protons 50 RHIC 49 largest atom smasher 49 GeV 48 particle accelerators 48 TeV 48 muons 47 cosmic rays 47 Tevatron 47 gravitational wave 46 particle collider 46 subatomic particles 46 WIMPs 46 beamline 46 subatomic 46 atomic particles 46 picosecond 45 cosmic ray 45 Cern 45 atom smasher 45 Fermilab 45 proton beam 45 LHC 44 petaflops 44 muon 44 XMM Newton 44 atomic nuclei 44 petaflop 44 National Ignition Facility 43 CERN 43 neutrino 43 quark gluon plasma 42 Gravity Probe B 42 comet nucleus 42 positrons 42 radioactive decay 42 positron 42 gamma ray 42 superconducting magnets 42 electron beams 42 particle physics 41 COROT 41 physicists 41 general relativity 41 neutrons 41 IceCube 41 petascale 41 atomic nucleus 40 orbiting observatory 40 photons 40 gamma rays 40 antimatter 40 proton 40 orbiting telescope 40 comet Wild 40 interstellar dust 40 Einstein theory 40 comet 40 interferometer 40 PASADENA Calif. NASA 40 ESO Very Large Telescope 40 particle physicists 40 Physicists 40 bandgap 40 scramjet 40 Cassini Huygens 39 hydrogen atoms 39 neutrinos 39 laser pulse 39 Hubble Telescope 39 spectroscopic 39 nanometer sized 39 comet Tempel 1 39 neutron 39 photon 39 ion beam 39 Very Large Telescope 39 cyclotron 39 magnetar 39 velocities 39 gravitational waves 39 distant galaxies 39 superconductivity 39 nuclei 39 Hubble telescope 39 atoms 39 meteoroid 39 X ray beam 39 cometary 39 tesla 39 X ray diffraction 39 photonic crystal 39 oxygen uptake 38 supersymmetry