[en] Short communication. 1 fig., 13 refs

[en] Short communication. 3 figs., 1 ref

[en] Short communication. 1 fig

[en] The model has 4 components: the extragalactic background, the radiation from the galactic disc and 2 components related to a spur. It fits observations while the hypothetical radio halo does not. (author). 4 figs., 21 refs

[en] New galactic radial velocity fields are presented. Turbulence is incorporated via the stochastic star formation processes. (author). 5 figs., 16 refs

[en] A kinematic model is developed based on a dynamical model of stellar population synthesis. The model predictions are compared with two proper motion catalogues. (author). 2 figs., 15 refs

[en] The closed universe consisting of two spherical voids separated by a thin shell of matter is studied in the framework of Israel formalism. It is shown that this model has no horizon. A naive quantization removing the singularity is performed. (author). 1 fig., 3 refs

[en] A review is presented of a series of works on the galactic evolution putting emphasis on the foundations of the models instead of on their detailed structure. Examples are given of how the mathematical formulation is produced from the physical input, how it can be modified as physics is enriched, and what kind of results can be obtained. (author). 5 figs., 11 refs

[en] A survey is presented of basic characteristics of new cosmological theories. The theory is explained of the very early universe, the so-called inflationary universe. Some new observations are presented as are results of new cosmological experiments. Briefly described are cosmological models of galaxy formation: cold dark matter models, unstable dark matter models, hierarchical explosions and string models. In conclusion, partial problems are outlined which may be resolved in current or future experiments. (M.D.). 3 figs., 2 tabs., 36 refs

[en] The radiation and gravitational forces on dust grains from the disk are evaluated for a large sample of spiral galaxies. The main results are a selective expulsion of grains and the presence of equilibrium positions inside the halo, providing a new test for the distribution of dark matter. (author). 6 figs., 1 tab., 11 refs