[en] With the 6-m telescope radial velocities have been determined for 53 objects on Kostyuk's list of galaxies with outer ring structure

[en] The time variations in the galactic cosmic-ray intensity at the earth's orbit over the past 30,000 yr have been derived from measurements of the cosmogenic ¹⁰Be abundance in Antarctic and Greenland ice. Some possible causes of these fluctuations are discussed

[en] The plasma waves in type III solar radio-burst sources might have a spectrum which can explain why, in the quasilinear burst generation model, nonlinear scattering of the waves by ions is so weak. The agent exciting a burst would travel through the corona at velocities limited to a definite range

[en] Photoelectric U, B, V observations obtained with the 2.6-m and 6-m telescopes in September--October 1981 are reported for 58 globular clusters in the Andromeda Nebula

[en] Independent differential (center--limb) measurements of the brightness of the quiet sun on 1981 June 22 at lambda = 13.5 mm in the Crimea and at 8 mm in Finland show synchronous variations with 160-min periodicity

[en] Fourier analysis of the time profiles of several solar hard x-ray bursts discloses quasiperiodic oscillations with periods of order 1--2 sec

[en] Evolutionary sequences of spherically symmetric numerical models simulating planetary nebulae have been calculated, covering the period from envelope detachment to dispersal. The dynamical effects of the stellar radiation pressure on the dust, the ionization front, and the high-speed stellar superwind are included. The infrared and radio spectra of the emergent radiation are determined. These models indicate the general evolutionary behavior of the dynamical properties and the continuous spectrum of a planetary. Comparison against the observed spectrum of NGC 7027 and the empirical relation between the radius and expansion velocity of planetaries supports the relevance of the models to analysis of observational data

[en] If a pulsar has a surface magnetic field strength B/sub p/>0.2B/sub cr/ (B/sub cr/ = m²c³/eh), then many of its curvature γ-ray photons whose magnetic vector is parallel to the plane containing the photon wave vector k and the external magnetic field vector B will decay, splitting into two photons before the pair-production threshold is reached. By observing the polarization of the curvature γ rays of pulsars one may be able to estimate B/sub p/

[en] Analysis of observations of CH Cyg during the 1984-1985 fade of the hot component indicates that, if this star accretes material from the cool M6 primary more slowly and its bolometric luminosity drops, its effective temperature and Lyman-continuum flux may nevertheless rise. Accordingly, when it is at minimum light the hot source will begin significantly to ionize the gaseous envelope surrounding the binary system, enlarging the corresponding H II region and raising the 15-GHz flux density to the observed value of 35 mJy. 15 references

[en] The pattern of rings in the Uranus system is described, and previous hypothesis seeking to explain that pattern are reviewed. It is proposed that the ring pattern is produced by resonances from five undiscovered satellites located beyond the outer boundary of the rings. The satellite orbit radii would be 66,450, 62,470, 58,600, 55,380, and 51,580 km. This hypothesis is supported by the clearly nonrandom placement of the rings, enabling an accurate determination of the presumed satellite orbits. 12 references