On the Alignment of Galaxies in Clusters H. M. TovmassianJ. P. Torres-Papaqui OriginalPaper 11 November 2020 Pages: 447 - 458
A Multiwavelength Study of Distant Blazar PKS 0537-286 N. SahakyanD. IsrayelyanG. Harutyunyan OriginalPaper 14 November 2020 Pages: 459 - 469
PPN Motion of S-Stars Around Sgr A* R. I. Gainutdinov OriginalPaper 14 November 2020 Pages: 470 - 481
Spectroscopy and Kinematics of the High-Latitude UX Ori Type Star V1117 Her I. S. PotravnovM. V. Eselevich OriginalPaper 17 November 2020 Pages: 482 - 490
Humps and Superhumps in the SU UMa-Type Dwarf Nova System IRXS J161659.5+620014 E. P. PavlenkoA. A. SosnovskijO. I. Antoniuk OriginalPaper 14 November 2020 Pages: 491 - 503
Differential Rotation of Stars in Spectral Class A I. S. SavanovE. S. KalinichevaE. S. Dmitrienko OriginalPaper 14 November 2020 Pages: 504 - 510
Study of the Binary Star ADS 7251 by Observations on the 65-cm Refractor at Pulkovo from 1962-2018 N. A. ShakhtD. L. GorshanovL. G. Romanenko OriginalPaper 14 November 2020 Pages: 511 - 522
Spectral Observations of Emission Stars in the Vicinity of Cyg OB7 N. D. Melikian OriginalPaper 14 November 2020 Pages: 523 - 533
Some Manifestations of Nonstationarity in the Spectra of Early-Type Supergiants A. G. Nikoghossian OriginalPaper 14 November 2020 Pages: 534 - 551
Fundamental Reasons for the Similarity and Differences of the Mass Spectra of Various Astronomical Objects A. V. TutukovB. M. Shustov OriginalPaper 14 November 2020 Pages: 552 - 565
Analytic Solution of the Nonlinear Radiative Diffusion Problem in a One-Dimensional Purely Scattering Medium. II H. V. Pikichyan OriginalPaper 14 November 2020 Pages: 566 - 579
Barometric Formula for Ultrarelativistic Degenerate Fermi-Gases A. E. Dubinov BRIEF COMMUNICATIONS 14 November 2020 Pages: 580 - 584
Outburst of V1118 Ori during 2018-2020 J. Garcia GarciaE. S. ParsamianA. A. Akopian BRIEF COMMUNICATIONS 14 November 2020 Pages: 585 - 589