- Astronomy, Observations and Techniques 19
- Astrophysics and Astroparticles 16
- Physics, general 13
- Nuclear Physics, Heavy Ions, Hadrons 10
- Classical and Quantum Gravitation, Relativity Theory 7
- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) 7
- Quantum Physics 6
- Atomic, Molecular, Optical and Plasma Physics 5
- Nuclear Fusion 5
- Optics, Lasers, Photonics, Optical Devices 5
- Elementary Particles, Quantum Field Theory 4
- Astrobiology 3
- Astronomy, Astrophysics and Cosmology 3
- Atomic/Molecular Structure and Spectra 3
- Cosmology 3
- Electrical Engineering 3
- Particle and Nuclear Physics 3
- Theoretical, Mathematical and Computational Physics 3
- Classical Mechanics 2
- Condensed Matter Physics 2