The design and construction of an asteroid-borne giant optical telescope, and a multi-antenna ultra long baseline free-flying radio interferometer are described. The large scale and extreme tolerance of each instrument will require fabrication in space from nonterrestrial materials, and novel features of optical design. Details of the capabilities

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