Astronomy Letters -- August 2005 Volume 31, Issue 8, pp. 501-574 H I Observations of Flat Galaxies S. N. Mitronova, W. K. Huchtmeier, I. D. Karachentsev, V. E. Karachentseva, and Yu. N. Kudrya pp. 501-514 Full Text: PDF (337 kB) Formation of Galactic Subsystems in Light of the Magnesium Abundance in Field Stars: The Thick Disk V. A. Marsakov and T. V. Borkova pp. 515-527 Full Text: PDF (462 kB) Universal Mechanism of Thermonuclear Explosion for Single (Type I + 1/2) and Binary (Type Ia) Presupernovae: The History and Prospects V. S. Imshennik and N. V. Dunina-Barkovskaya pp. 528-536 Full Text: PDF (202 kB) Comparison of the Fermi and Betatron Acceleration Efficiencies in Collapsing Magnetic Traps S. A. Bogachev and B. V. Somov pp. 537-545 Full Text: PDF (199 kB) Structure of Solar-Wind Streams at the Maximum of Solar Cycle 23 N. A. Lotova, K. V. Vladimirskii, V. N. Obridko, B. P. Filippov, and O. A. Korelov pp. 546-556 Full Text: PDF (348 kB) To the Description of Long-Term Variations in the Solar Magnetic Flux: The Sunspot Area Index Yu. A. Nagovitsyn pp. 557-562 Full Text: PDF (276 kB) Conservative Two-Body Problem with Variable Masses L. G. Luk'yanov pp. 563-568 Full Text: PDF (169 kB) Automatic Guide for the Raduga Astronomical Spectrograph S. A. Potanin pp. 569-574 Full Text: PDF (218 kB)