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(Click for frequent words.) 75 neutrons 72 atoms 71 nuclei 71 hydrogen nuclei 68 subatomic particles 67 atomic particles 67 antiprotons 66 hadrons 66 antiparticles 66 hydrogen atoms 66 neutron stars 66 deuterium atoms 66 planetesimals 65 nucleon 65 antimatter particles 65 protons 65 atomic nucleus 65 neutralinos 64 subatomic 64 fermions 64 kaons 64 photons 64 helium atoms 64 radioactive decay 63 electrons 63 neutron star 63 antineutrinos 62 magnetic fields 62 antihydrogen 62 helium nuclei 62 exciton 62 gluons 62 hydrogen atom 62 bosons 62 massless particles 62 excitons 62 alpha particles 62 quarks 62 helium atom 62 antiparticle 62 sodium atoms 62 Neutron stars 61 Muons 61 proton 61 neutrinos 61 supernova explosions 61 solar nebula 61 galaxy clusters 61 protostar 61 spherical particles 61 muons 61 solitons 61 antiquarks 61 quark gluon plasma 61 bosonic 61 particles 61 solar neutrinos 61 magnetic monopoles 61 positrons 61 electrons behave 60 interstellar medium 60 Neutrinos 60 phonons 60 rubidium atoms 60 Gravitational waves 60 galactic disk 60 strange quark 60 mesons 60 electron neutrinos 60 Bose Einstein condensates 60 oxygen atoms 60 fermion 60 muon 60 Earth magnetosphere 60 electrons orbiting 60 nucleons 60 accretion disk 60 Rydberg atom 60 interstellar clouds 60 polaritons 60 protoplanetary disk 60 branes 60 axions 60 magnetar 60 quasiparticles 60 W boson 60 spacetime 60 electron beams 60 quantum particle 60 protons neutrons 59 particle beams 59 leptons 59 supernova explosion 59 unpaired electrons 59 chondrules 59 quantum mechanical 59 deuterium 59 antiferromagnets 59 gravitational interactions 59 Bose Einstein condensate 59 Alfven waves 59 neutrino 59 superheavy elements 59 Alfvén waves 59 excitations 59 antihelium 4 59 quanta 59 weakly interacting 59 covalent bonds 59 electromagnetism 59 gravitational attraction 59 phosphorus atoms 59 tau neutrinos 59 Higgs bosons 59 positron 58 organic molecules 58 spherically symmetric 58 electron spins 58 baryons 58 orbitals 58 Saturn magnetosphere 58 protoplanets 58 deuterium nuclei 58 fermionic atoms 58 Bose Einstein Condensate 58 rubidium vapor 58 superfluids 58 graphene sheets 58 millisecond pulsar 58 sterile neutrinos 58 quantum tunneling 58 electrons protons 58 superfluid 58 wavefunction 58 WIMPs 58 millisecond pulsars 58 magnetic excitations 58 Photons 58 X ray pulses 58 graphene sheet 58 galactic clusters 58 pions 58 antiproton 58 gravitationally 57 ultracold atoms 57 electron orbits 57 hydrogen ions 57 magnetization 57 relativistic particles 57 electron positron pairs 57 atom smashers 57 Rydberg atoms 57 ions 57 spiral galaxies 57 meson 57 dynamical evolution 57 nanobubbles 57 nucleosynthesis 57 dye molecules 57 supermassive black holes 57 quantum superposition 57 plasmons 57 strange quarks 57 Neutrons 57 supersymmetric particles 57 WASP #b 57 silicon atoms 57 electron 57 ultracold 57 galaxies 57 circumstellar 57 HM Cancri 57 magnetosphere 57 chromophores 57 Fermions 57 quantum mechanically 57 UV photons 57 proto galaxies 57 elongated orbits 57 hydrides 57 galaxies collide 57 ionized gas 57 electron pairs 57 gravitational radiation 57 nanomagnets 57 energetic electrons 57 supernovae 57 osmium 57 magnetic vortices 57 gamma rays 57 nanomotors 57 ultracold molecules 57 Gamma rays 57 B meson 56 high temperature superconductivity 56 hydrocarbon molecules 56 Antennae Galaxies 56 B mesons 56 active galactic nuclei 56 superconductivity 56 fission 56 nucleobases 56 runaway thermonuclear 56 electronic excitations 56 boson 56 baryon 56 GeV 56 graphene layers 56 particle 56 magnetic flux 56 colliding protons 56 photon energies 56 X ray emission 56 baryonic 56 atom 56 infalling 56 californium 56 quasicrystal 56 molecules 56 Hot Jupiters 56 photon 56 hot Jupiters 56 ionized particles 56 merging galaxies 56 cesium atoms 56 supersymmetric 56 surface plasmons 56 laser pulse 56 type Ia supernova 56 lithium atoms 56 quantum electrodynamics 56 helium ions 56 fission reactions 56 cobalt atom 56 silicate dust 56 neutralino 56 spontaneous fission 56 gluon 56 quasicrystals 56 cosmic ray particles 56 accretion disks 56 gamma rays emitted 56 spheroidal 56 protons electrons 56 observable universe 56 hydrogen helium 56 Bose Einstein condensation 56 ionise 56 nanocrystals 56 Bullet Cluster 56 silicon monoxide 56 superheavy element 56 antimatter 56 particle acceleration 56 colliders 56 ferromagnetic materials 56 van der Waals 56 galactic cosmic rays 56 quantum coherence 55 SN #A 55 high temperature superconductors 55 diffraction pattern 55 supernova remnants 55 spontaneous symmetry 55 electron spin 55 electrons positrons 55 ferromagnet 55 beryllium ions 55 Maxwell equations 55 tetrahedra 55 dwarf galaxy 55 Brownian motion 55 antiquark 55 antihelium 55 diatomic 55 AB Aurigae 55 hadron 55 angular momentum 55 quark 55 earth crust 55 dipole moment 55 ion collisions 55 dwarf galaxies 55 planets orbits 55 antihydrogen atoms 55 Higgs particle 55 chemical reactions 55 hydroxyl radicals 55 rocky planets 55 particle accelerators 55 electroweak 55 subatomic particle 55 gravitational waves 55 crystal lattices 55 qubit 55 ionize 55 magnons 55 polariton 55 nanocrystal 55 supermassive black hole 55 particles WIMPs 55 AGNs 55 potassium atoms 55 optical lattice 55 hydrogens 55 quantum bits 55 rubidium atom 55 blazars 55 starburst galaxies 55 topological insulators 55 dipolar 55 noble gases 55 ferromagnetic 55 ion beams 55 unpaired electron 55 impactors 55 quantum particles 55 Pauli exclusion 55 Cosmic rays 55 lipid membranes 55 superposition 55 ejecta 55 fundamental constants 55 chiral molecules 55 emit X rays 55 evanescent waves 55 magnetic dipoles 55 undiscovered particle 55 antimatter atoms 55 sulfur atoms 55 protostars 55 biological molecules 55 SUSY 55 icy moons 55 valence electrons 55 Higgs singlet 55 X ray binaries 55 magnetic dipole 55 energetic gamma rays 55 W bosons 55 momenta 55 wave particle duality 55 blue straggler 55 CMB photons 54 magnetars 54 Hawking radiation 54 Eta Carinae 54 absorb neutrons 54 shorter wavelengths 54 nanoclusters 54 ULIRGs 54 relativistic protons 54 cosmic ray collisions 54 polarized electrons 54 phytochrome 54 dimers 54 distant galaxies 54 chirality 54 blue supergiant 54 Milky Way galaxy 54 tokamak 54 CERN LHC 54 helical structures 54 gravitational interaction 54 vortices 54 quasiparticle 54 circular orbits 54 entangled quantum 54 nanotubes 54 Electrons 54 conduction electrons 54 Casimir cavity 54 fissioning 54 dimer 54 Mott insulator 54 magnetic reconnection 54 Feshbach resonance 54 crystal lattice 54 positronium atoms 54 infall 54 reactants 54 gamma ray emission 54 gravitationally bound 54 collisional 54 colliding galaxies 54 SN #gy 54 carbon atoms 54 atoms ions 54 gamma ray photons 54 Supernovae 54 hyperfine 54 muon neutrino 54 photons particles 54 tholins 54 phosphorus atom 54 chemically reactive 54 electron volts 54 quantum mechanics 54 superpositions 54 Arches Cluster 54 nitrogen atoms 54 iron pnictides 54 oppositely directed 54 elliptical galaxies 54 superdense 54 SMBHs 54 colloidal crystals 54 Gal Yam 54 orbital angular momentum 54 brown dwarf 54 gravitational 54 SMBH 54 optical lattices 54 pulsars 54 gravitational pulls 54 cosmic rays 54 singularities 54 superlens 54 boron atoms 54 galaxy cluster 54 bilayer graphene 54 ceria 54 protoplanetary 54 sterile neutrino 54 silicates 54 colloidal particles 54 filaments 54 rotating neutron stars 54 brown dwarfs 54 smashing protons 54 zinc ions 54 sulfur atom 54 crystalline structure 53 lanthanides 53 antineutrino 53 icy comets 53 magma ocean 53 surface plasmon 53 plasmonic 53 electron ion 53 cesium atom 53 RS Ophiuchi 53 yttrium barium copper 53 GRBs 53 quantum entanglement 53 crystallites 53 vibrating strings 53 nanometer scale 53 trimers 53 magnetospheric 53 planets comets 53 unconventional superconductivity 53 hydrogen isotopes 53 fissions 53 diffract 53 ultrasonic vibrations 53 infrared laser pulses 53 thermoelectric materials 53 nanolaser 53 chlorine atom 53 intramolecular 53 planetary embryos 53 interstellar dust grains 53 electron positron 53 particle colliders 53 emit photon 53 Bosons 53 attosecond pulses 53 supersolid 53 binds quarks 53 chlorophylls 53 pulsar 53 asymptotic freedom 53 alpha particle 53 oxygen atom 53 nanostructure 53 gravitons 53 ultracold temperatures 53 bilayer 53 Milky Way halo 53 phonon 53 ultracold gas 53 uncharged particles 53 carbonate minerals 53 Dirac equation 53 electric dipole 53 catalytically active 53 Mott insulators 53 femtosecond timescale 53 hafnium 53 lepton 53 globulars 53 neutron beams 53 GJ #b [001] 53 baryonic matter 53 electron volt 53 magnetic monopole 53 Type Ia supernova 53 globular clusters 53 neutron 53 Type 1a supernovae 53 galactic cores 53 globular cluster 53 alkali atoms 53 decoherence 53 tetrahedral 53 Higgs Boson particle 53 spherical nanoparticles 53 RHIC 53 tokamaks 53 magnetic particles 53 ions electrically charged 53 outer layers 53 thermonuclear explosion 53 ferromagnetism 53 radiative 53 BECs 53 dopant atoms 53 van der Waals forces 53 van der Waals interactions 53 neutrino mass 53 planetesimal 53 supermassive stars 53 protoplanet 53 fission reactor 53 gamma ray radiation 53 nebular 52 interstellar cloud 52 microstructures 52 Bose Einstein condensate BEC 52 entangled photons 52 sunlike star 52 positronium 52 nanosheets 52 strangelets 52 silicate minerals 52 matter antimatter asymmetry 52 proton proton collisions 52 superstrings 52 planemos 52 soliton 52 nanotube 52 conventional superconductors 52 Fermilab Tevatron 52 GJ #b [002] 52 elliptical galaxy 52 dimensional electron 52 photons emitted 52 lensing galaxy 52 planetary nebulae 52 ultraviolet wavelengths 52 plasmon 52 nanorings 52 helices 52 gravity electromagnetism 52 carbene 52 comet nucleus 52 quantum dot 52 magnetization reversal 52 gaseous planet 52 supernovae explosions 52 blazar 52 macromolecule 52 red supergiants 52 ferroelectricity 52 Particle physics 52 beryllium ion 52 extrasolar 52 piezoelectric materials 52 photonic crystal 52 proton antiproton collisions 52 quantum dots 52 Milky Way 52 crystalline solids 52 Henize #-# 52 nanoworld 52 exoplanetary 52 photochemistry 52 electrostatic repulsion 52 paramagnetic 52 nanoscopic 52 gravitational wave 52 planet magnetosphere 52 QDs 52 semiconductor nanocrystals 52 Earth crust 52 semiconducting materials 52 electron scattering 52 J# +# [002] 52 cadmium selenide 52 interstellar dust 52 oppositely charged 52 inhomogeneous 52 planetary orbits 52 Magnetic reconnection 52 proton antiproton 52 graphite whiskers 52 photochemical reactions 52 cosmic gamma rays 52 laser pulses 52 chondrites 52 substorms 52 terahertz radiation 52 Type Ia supernovae 52 proplyds 52 zeolites 52 Kuiper Belt objects 52 quasar 52 lithosphere 52 strontium atoms 52 red supergiant 52 electron electron 52 macroscale 52 circumstellar disk 52 optical resonator 52 Brookhaven Relativistic Heavy 52 planetary nebula 52 stellar nurseries 52 multiferroic 52 strangelet 52 strontium titanate 52 gravity warps 52 particle detectors 52 quasars 52 ultraviolet photons 52 ferromagnets 52 vanadium dioxide 52 graviton 52 chromophore 52 distant supernovae 52 Z boson 52 triangular lattice 52 sparticles 52 dynamical 52 Saturn rings 52 topological defects 52 nanoscale 52 proton beams 52 fermionic 52 superconducting materials 52 thermonuclear reactions 52 gaseous planets 52 covalent bond 52 SWNTs 52 picosecond 51 amorphous calcium carbonate 51 superatoms 51 nanoglue 51 tau neutrino 51 meteoroids 51 cometary material 51 antiferromagnetic 51 infrared photons 51 scintillator 51 diamagnetic 51 manganese atoms 51 hydrophobic molecules 51 x ray pulses 51 X ray photons 51 fullerene 51 gold nanoclusters 51 SN#A 51 astrophysical objects 51 Supernova #A 51 quantum dot lasers 51 zinc sulfide 51 electron density 51 post perovskite 51 moonlets 51 photosphere 51 liquid droplets 51 lattice vibrations 51 spintronic devices 51 primitive meteorites 51 impactor spacecraft 51 Kuiper belt 51 filamentary 51 intrinsic brightness 51 nanostructures 51 entangled qubits 51 supermassive 51 X ray wavelengths 51 gold nanorods 51 Milky Way Galaxy 51 microquasar 51 supersymmetry 51 cosmic phenomena 51 HD#b 51 nonmagnetic 51 attosecond 51 frictional heating 51 cosmic ray 51 solar corona 51 protons collide 51 magnetic anisotropy 51 absorbs photons 51 carbonaceous chondrites 51 electron proton 51 antiparallel 51 physicists 51 luminous galaxies 51 microcavities 51 spectroscopic techniques 51 cuprates 51 elongated orbit 51 HL Tau 51 Wolf Rayet stars 51 Cerenkov radiation 51 electron pairing 51 sunlike stars 51 hydroxyl molecules 51 riboswitch 51 electrodynamics 51 substorm 51 galactic halo 51 photosystem 51 gaseous 51 femtoseconds 51 exoplanets orbiting 51 Einstein cosmological constant 51 Murchison meteorite 51 topological insulator 51 Iapetus 51 silica particles 51 rotational axis 51 relativistic jets 51 redox reactions 51 photoionization 51 crustal plates 51 vibrational modes 51 planet WASP #b 51 cesium ions 51 general relativity 51 nanosized 51 Magnetars 51 superluminal 51 metastable 51 MeV 51 molten magma 51 neutrino oscillation 51 ion traps 51 nuclear fission 51 terrestrial planets 51 vibrationally excited 51 single walled nanotubes 51 atomic lattice 51 micrometer sized particles 51 cobalt atoms 51 symmetries 51 nanobelts 51 energetic cosmic rays 51 emits X rays 51 toroid 51 particle physics 51 chlorophyll molecules 51 magnetopause 51 Upsilon Andromedae 51 interatomic 51 aerosol particles 51 donor acceptor 51 PSR J# +# 51 diffracted 51 titania 51 Cherenkov radiation 51 crustal rocks 51 comet tail 51 gravitational tides 51 copper oxide superconductors 51 kcal mol 51 alkynes 51 monolayers 51 spinning neutron 51 astrophysical 51 CAIs 51 abiogenesis 51 fission fusion 51 RNA molecule 51 terahertz waves 51 planet HD #b 51 Virgo cluster 51 superfluidity 51 molecule 51 comets 51 nonlinear optical 51 theoretical particle 51 Beta Pictoris b 51 planets 51 vibrational 51 electron orbitals 51 comet orbit 51 qubits 51 coronal mass ejections 51 quantum gravity 50 geoneutrinos 50 proton neutron 50 unpolarized 50 relativistic 50 hypernova 50 biomolecules 50 magnetic tweezers 50 barium titanate 50 gravitational lens 50 alkali metal 50 Cosmic Microwave Background CMB 50 pnictides 50 high redshift galaxies 50 muon neutrinos 50 rotaxanes 50 circularly polarized light 50 binds particles 50 macroscopic objects 50 Epsilon Eridani 50 microwave photon 50 faraway galaxies 50 accreting 50 nanoscale structures 50 binary asteroids 50 quantum chromodynamics 50 diffraction patterns 50 interferometers 50 Rayleigh scattering 50 intermolecular 50 nanorod 50 indium arsenide 50 gamma ray bursts 50 visible wavelengths 50 reactive molecules 50 stony meteorites 50 thermonuclear fusion 50 organometallic compounds 50 nonequilibrium 50 Sagittarius dwarf galaxy 50 ionized molecules 50 chlorine peroxide 50 vesicle fusion 50 nanodroplets 50 exosphere 50 semiconducting nanotubes 50 fermionic condensate 50 Einstein equations 50 metallic nanostructures 50 Trojan asteroids 50 God Particle 50 nanometer sized 50 Cosmologists 50 hypervelocity stars 50 LHC experiments 50 Type Ia 50 carbon nanotubes 50 particle physics experiments 50 walled carbon nanotube 50 nanodots 50 chalcogenides 50 hydrogen 50 martensite 50 hydroxide ions 50 cuprate 50 microcavity 50 biomolecule 50 interconversion 50 dopants 50 spectral measurements 50 enthalpy 50 filament 50 comet dust 50 photosystems 50 oxygen ions 50 superconductors 50 chemical reactivity 50 millimeter wavelength 50 femtosecond laser pulse 50 Heisenberg uncertainty principle 50 Fermilab accelerator 50 dense neutron stars 50 chromosphere 50 cuprate superconductors 50 magnesium ions 50 pion 50 mesoscopic 50 Galilean moons 50 nanoscale dimensions 50 hydride 50 ionized 50 nanohorns 50 spectroscopic technique 50 superposed 50 supernova 50 surface plasmon polariton 50 actinides 50 emit photons 50 Particles 50 GJ#b 50 Distant galaxies 50 Mercury magnetosphere 50 protoplanetary discs 50 perovskite 50 reactant 50 heliosphere 50 elemental abundances 50 quantum theory 50 ionized gases 50 tiniest particles 50 GQ Lupi 50 gamma ray burst 50 electron orbiting 50 CdSe 50 Type Ia supernovas 50 cosmic particles 50 superconduct 50 gravitational lensing 50 gravitational tugs 50 ab initio calculations 50 water vapor 50 carbon atom 50 electrons emitted 50 titania nanotubes 50 subatomic scale 50 multi walled nanotubes 50 heliosheath 50 superconductor 50 comets orbiting 50 quantum phenomena 50 particle accelerator 50 sulfate aerosol 50 Haumea 50 V# Mon 50 Fomalhaut b 50 amino acids 50 heavy fermion 50 adatoms 50 meteoritic material 50 pn junction 50 Earth ionosphere 50 meta atoms 50 conjugated polymers 50 earths 50 fluorescent molecules 50 foreground galaxy 50 isomers 50 exo planets 50 micelles 50 THz radiation 50 palladium nanoparticles 50 cell cytoplasm 50 ruthenium 50 lipid membrane 50 superconducting 50 lunar crust 50 protoplanetary disks 49 ATLAS detector 49 Raman scattering 49 magnetic coupling 49 torus 49 RNA molecules 49 delocalized 49 dipoles 49 Corot 7b 49 eukaryotic cells 49 nanoshells 49 type Ia supernovae 49 ultradense 49 brane 49 nonpolar 49 supergiant star 49 X ray beams 49 spatially resolved 49 nanoelectromechanical 49 electrically conducting 49 cosmic strings 49 filamentary structure 49 organelles 49 thermal equilibrium 49 SWCNT 49 DNA strands 49 photocatalysts 49 distant quasars 49 antibody antigen 49 molten iron 49 Schrodinger equation 49 cosmological constant 49 dwarf spheroidal galaxies 49 Seebeck effect 49 photoemission 49 multipartite entanglement 49 nebula 49 coronal mass ejections CMEs 49 interfacial 49 KamLAND 49 azobenzene 49 neutron radiation 49 chemical reactants 49 scanning electron microscopes 49 galaxy formation 49 multicellular organisms 49 Oort Cloud 49 resonant tunneling 49 VHE gamma rays 49 graphene 49 bismuth telluride