85Axx Astronomy and astrophysics (For celestial mechanics, see 70F15)
- 85A04 General
- 85A05 Galactic and stellar dynamics
- 85A15 Galactic and stellar structure
- 85A20 Planetary atmospheres
- 85A25 Radiative transfer (1)
- 85A30 Hydrodynamic and hydromagnetic problems [See also 76Y05]
- 85A35 Statistical astronomy
- 85A40 Cosmology (For relativistic cosmology, see 83F05)
- 85A99 Miscellaneous topics