- Astronomy, Observations and Techniques 12
- Astrophysics and Astroparticles 11
- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) 7
- Aerospace Technology and Astronautics 6
- Planetology 6
- Science, Humanities and Social Sciences, multidisciplinary 6
- Science, multidisciplinary 6
- Classical and Quantum Gravitation, Relativity Theory 3
- Astrobiology 1
- Cosmology 1