We surveyed a 50 arcmin 2 region in the Virgo cluster core to search for intergalactic planetary nebulae and found 11 candidates in the surveyed area. The measured fluxes of these unresolved sources are consistent with these objects being planetary nebulae from an intergalactic population of stars, although we cannot exclude some minor

In a statistical study of the decay of individual sunspots based on DPR data we find that the mean instantaneous area decay rate is related to the spot radius r and the maximal radius r0 as D=C r/r0, C=32.0 +- 0.26 MSH/day. This implies that sunspots on the mean follow a parabolic decay law; the traditional linear decay law is excluded by the data

Not Available

IAUC 6792 available at Central Bureau for Astronomical Telegrams.

Understanding the connection between normally evolving galaxies and those with extreme nuclear activity, the so-called Active Galactic Nuclei, is a fundamental problem in the study of both galaxy evolution and of AGN. From HST images of the 96 BL Lacertae objects observed in our Cycle 5 and 6 programs, we have determined the absolute magnitudes and

We present deep V, R, and I broadband CCD images of the northern radio lobe associated with the radio galaxy 3C 390.3. Spatially resolved emission coincident with the brightest region of the northern lobe (hot spot B) is detected in all filters, with surface brightness V=24.6 mag arcsec ^{-2} and V-I color ~ 0.8. The new optical data, together with