Spots structure and stratification of helium and silicon in the atmosphere of He-weak star HD 21699
Spotting in stars with a low level of activity, cloze to solar activity
SS 433: The accretion disk revealed in H alpha
SS 443: multicolour observations 1982-1990
SS Ari: a shallow-contact close binary system
SST/CRISP Observations of Convective Flows in a Sunspot Penumbra
Stability of g-modes in rotating B-type stars
Stability of latitudinal differential rotation in stars
Stability of pulsar rotational and orbital periods
Stability of self-gravitating discs under irradiation
Stability of the toroidal magnetic field in stellar radiation zones
Stability of thermal modes in cool prominence plasmas
Standard and helical magnetorotational instability: How singularities create paradoxal phenomena in MHD
Standard candles from the Gaia perspective
Standing shocks in the inner slow solar wind
Standing Slow-Mode Waves in Hot Coronal Loops: Observations, Modeling, and Coronal Seismology
Star and protoplanetary disk properties in Orion's suburbs
Star Clusters Under Stress: Why Small Systems Cannot Dynamically Relax
Star formation and disk properties in Pismis 24
Star Formation and the Hall Effect