Two-photon 2s ↔ 1s transitions during hydrogen recombination in the universe E. E. KholupenkoA. V. Ivanchik OriginalPaper Pages: 795 - 803
Observational manifestations of the change in the tilt of the accretion disk to the orbital plane in her X-1/HZ her with phase of its 35-day period D. K. KlochkovN. I. ShakuraN. A. Ketsaris OriginalPaper Pages: 804 - 815
On the nature of the unique eclipsing system H 187 (HMW 15) V. P. GrininO. Yu. BarsunovaT. V. Demidova OriginalPaper Pages: 827 - 831
On the nature of the photometric activity of the T Tauri star V1184 Tau O. Yu. BarsunovaV. P. GrininS. G. Sergeev OriginalPaper Pages: 832 - 835
Superosculating intermediate orbits: Fourth-and fifth-order tangencies to trajectories of perturbed motion V. A. Shefer OriginalPaper Pages: 845 - 858