- Astronomy, Observations and Techniques 43
- Astrophysics and Astroparticles 31
- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) 25
- Astrobiology 14
- Cosmology 14
- Astronomy, Astrophysics and Cosmology 7
- Aerospace Technology and Astronautics 4
- Planetology 4
- Particle and Nuclear Physics 2
- Science, Humanities and Social Sciences, multidisciplinary 1
- Science, multidisciplinary 1
- Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences 1