97.00.00 Stars (for relativistic stars, see 04.40.Dg in general relativity and gravitation)
- 97.10.-q Stellar characteristics and properties (see also section 26 Nuclear astrophysics) (1)
- 97.20.-w Normal stars (by class): general or individual
- 97.21.+a Pre-main sequence objects, young stellar objects (YSO`s) and protostars (T Tauri stars, Orion population, Herbig-Haro objects, Bok globules, bipolar outflows, cometary nebulae, etc.) (see also 98.38.Fs and 98.58.Fd Jets, outflows and bipolar flows-in the
- 97.30.-b Variable and peculiar stars (including novae)
- 97.60.-s Late stages of stellar evolution (including black holes) (1)
- 97.80.-d Binary and multiple stars
- 97.82.-j Extrasolar planetary systems
- 97.90.+j Other topics on stars (restricted to new topics in section 97)