Estimates of the spectral linewidths of low degree (l = 0 and l = 1), 5-min p-modes obtained from Doppler shift observations in 1984 (63 d) and 1986 (63 d) are reported. The observed linewidths increase from 0.5 micro-Hz at 2000 micro-Hz to 3 micro-Hz at 3800 micro-Hz for l = 0. Comparison with other data suggests that for a given frequency the

This paper presents the first systematic survey at optical wavelengths of galaxies with detected radio jets using CCD imaging. About 50 percent of the sample of low-redshift galaxies with radio jets have a large nearby companion and/or show peculiar optical morphology not detected in isolated ellipticals. Forty-five percent of the objects have a

The behavior of the isophotes of the E galaxies in a new photometric sample of 33 early-type galaxies belonging to the Virgo cluster (Caon) is compared to that of the S0 galaxies. Almost all objects flatter than b/a = 0.2 are found to exhibit 'pointed' (or 'lemon-shaped') isophotes irrespective of their Hubble class, while almost none do if rounder

CCD photometry for stars in three fields centered on the old open cluster NGC 188 is presented, with the aim of investigating the HR diagram distribution of cluster main-sequence stars. A sequence of subgiant, turnoff, and main-sequence stars has been detected, extending the observed lower main sequence down to about m(v) = 20 mag. It is found that

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Using published data on the large-scale distribution of solar activity, the authors conclude that the longlived coronal holes are formed and maintained by the unbalanced magnetic flux which developes at both extremes of the complexes of activity.