The discovery of structure in the 5 minute oscillations of the sun, integrated over the full disk, was reported by Claverie et al. (1979). This paper presents additional information on the discrete structure in the 5-minute velocity oscillation observed in integral sunlight. Measurements taken at Pic-du-Midi and Izana (on Tenerife) from 1976 to

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Recent data on, and interpretations of the Kleinmann-Low nebula are examined. It is suggested that associated high velocity gas is radiatively accelerated by a protostar in an early stage of premain-sequence contraction.

We have developed an automatic procedure to determine Teff and log g from the comparison of observational data with their theoretical values. After a description of the method we compare our results for a sample of 100 O-type stars with the classifications of Conti and Walborn and with the determinations of Morrison by photometric indices. The

A method for the determination of the intensity of the solar light scattered by a unit volume of interplanetary space and thus the density and phase functions of interplanetary dust is presented. The method involves the calculation of the scattered light intensity as a function of sun-particle distance and elongation angle from a partly assumed