Astronomy Letters -- July 2003 Volume 29, Issue 7, pp. 425-494 A Possible Shock Wave in the Intergalactic Medium of the Cluster of Galaxies A754 R. A. Krivonos, A. A. Vikhlinin, M. L. Markevitch, and M. N. Pavlinsky pp. 425-428 Full Text: PDF (785 kB) The Structure and Evolution of M 51-Type Galaxies V. P. Reshetnikov and S. A. Klimanov pp. 429-436 Full Text: PDF (190 kB) The Shape of the Rotation Curves of Edge-on Galaxies A. V. Zasov and A. V. Khoperskov pp. 437-446 Full Text: PDF (534 kB) A Unified Theory of the Formation of Galactic Bars V. L. Polyachenko and E. V. Polyachenko pp. 447-462 Full Text: PDF (340 kB) Estimating the Interstellar Extinction and the Contribution from an Accretion Shock to the Formation of Emission Continuum in DS Tau and DG Tau A. S. Kravtsova pp. 463-467 Full Text: PDF (207 kB) An Electronic Version of the Second Volume of the General Catalogue of Variable Stars with Improved Coordinates N. N. Samus', V. P. Goranskii, O. V. Durlevich, A. V. Zharova, E. V. Kazarovets, N. N. Kireeva, E. N. Pastukhova, D. B. Williams, and M. L. Hazen pp. 468-479 Full Text: PDF (219 kB) The Candidate Protoplanetary Object IRAS 22223+4327 Is a Pulsating Variable Star V. P. Arkhipova, R. I. Noskova, N. P. Ikonnikova, and G. V. Komissarova pp. 480-485 Full Text: PDF (191 kB) The Resonant Excitation of Transverse Oscillations in Coronal Loops A. M. Uralov pp. 486-493 Full Text: PDF (203 kB) The Contour of an Orbit and a Stable Periodic Orbit N. Yu. Kretser and T. A. Agekyan p. 494 Full Text: PDF (70 kB)