A neutron-powder-diffraction real-space structural refinement method is applied to study the local intermolecular correlations in bulk C60 solid at 10 K. We found that the orientation of the C60 molecules often deviates locally from the long-range average structure, and a significant number (30-40%) of molecules have the sixfold face oriented toward adjacent molecules.

A general expression of electromagnetic turbulent pressure in a plasma of inhomogeneous turbulence is derived from Vlasov’s equation using the properties of the spectrum of correlation of two fluctuating parameters. It is found that this pressure consists of two parts. One is the electromagnetic ponderomotive force produced by interaction between the nonresonant particles and the turbulent waves. The other is the direct transfer of momentum from the turbulent waves to the plasma through the interaction between the resonant particles and the waves. Corresponding representations of turbulent pressure for some turbulent oscillation modes (Alfvén waves, magnetohydrodynamic waves, whistlers, ion-acoustic oscillations, and Langmuir waves) are given for a plasma of Maxwellian distribution.

An upper limit to the amplitude of the overall density fluctuation has been found by means of the gravitational lensing effect of the density inhomogeneity on luminosity of quasars with large redshifts. The observed differences of luminosities of quasars located at different directions are partially given by the lensing effect; therefore, a useful upper limit to the inhomogeneity can be derived.

The redshift distribution of quasars associated with galaxies was analysed. One found that, for some samples of associated quasars, the distribution is periodic. Among all models to explain the existence of such associations, the multiply-connected topology model seems to be the best.

The distribution of quasars has become one of the most interesting problems in observational cosmology. This is due mainly to the development of theory of the formation of large scale structure in the universe. In recent years, several scenarios of clustering have been proposed. In the adiabatic case, the clustering process is from larger scales to smaller ones, i.e., the first systems to form out would be on the scale of superclusters, then these systems fragment to form smaller scale systems such as galaxies. In the isothermal case, the clustering is from smaller scales to larger ones, namely, galaxies condense out at first and larger scale systems, such as clusters and superclusters, then form later via hierachical build-up processes. In the universe contain two components, the scenario of clustering might be different from both standard adiabatic and isothermal cases(1). According to this new scenario, there should be two kinds of small scale objects, one is formed due to fragment of larger scale systems, another is formed before large scale systems form.

Hawking’s theory of quantum cosmology is the most important stage in understanding our universe since the big bang model. In principle, one can predict everything in the universe solely from physical laws. All main results within this framework have been reviewed in this paper.

> It has been shown by us that the periodicities of 163- and 6-day in SS433 can be explained very well by a model of precession-nutation accretion disc. In that paper we denoted that the relative phases between the periodic components of 163-day, 6.29-day, 6.06-day and 5.84-day are important for doing further test on the model. Recently, Mammano offered us the results of the phases obtained from observational analyses. The aim of this paper is to test the developed model by Mammano's data on phases.

The density distributions of visible and invisible matter in the universe are quite different from each other. Visible objects are obviously clustered on the scales of galaxies, clusters and superclusters, but invisible matter is distributed fairly uniformly.