- Astronomy, Observations and Techniques 16
- Astrophysics and Astroparticles 11
- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) 5
- Elementary Particles, Quantum Field Theory 4
- Geophysics/Geodesy 4
- Quantum Field Theories, String Theory 4
- Astronomy, Astrophysics and Cosmology 3
- Measurement Science and Instrumentation 3
- Nuclear Energy 3
- Nuclear Physics, Heavy Ions, Hadrons 3
- Astrobiology 2
- Cosmology 2
- Classical and Quantum Gravitation, Relativity Theory 1
- Quantum Physics 1