Plasma (Ionized gases) 101 Plasma Physics Physics 57 Atoms 47 Atoms and Molecules in Strong Fields, Laser Matter Interaction 46 Astrophysics 28 Astrophysics and Astroparticles 24 more ... Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) 21 Space sciences 21 Nuclear Energy 14 Nuclear energy 14 Lasers 13 Optics, Lasers, Photonics, Optical Devices 13 Photonics 13 Nuclear Fusion 12 Nuclear fusion 12 Geophysics 9 Atomic, Molecular, Optical and Plasma Physics 8 Classical Electrodynamics 8 Electrodynamics 8 Mathematical Methods in Physics 8 Optics 8 Fluid- and Aerodynamics 7 Fluids 7 Nuclear physics 7 Astronomy 6 Astronomy, Astrophysics and Cosmology 6 Astronomy, Observations and Techniques 6 Astronomy—Observations 6 Geophysics/Geodesy 6 less ...