- Astronomy, Observations and Techniques 20
- Astrophysics and Astroparticles 18
- Cosmology 6
- Classical and Quantum Gravitation, Relativity Theory 5
- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) 5
- Astrobiology 4
- Geophysics/Geodesy 4
- Optics, Lasers, Photonics, Optical Devices 4
- Electronics and Microelectronics, Instrumentation 3
- Atomic, Molecular, Optical and Plasma Physics 2
- Astronomy, Astrophysics and Cosmology 1
- Nuclear Fusion 1
- Nuclear Physics, Heavy Ions, Hadrons 1
- Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences 1