STEPHI is a photometry network that aims to obtain data to reach a better understanding of the physics of stellar interiors by seismology of δ Scuti stars. For ten years now STEPHI has been harvesting multisite rapid photometry data of δ Scuti stars on the main sequence. With 12 δ Scuti stars observed during three-week, three-site campaigns, STEPHI

Symbiotic Miras give a nice practical demonstration of the formation of bipolar and highly aspherical nebulae as a consequence of interaction in detached binaries. We believe that these binary systems are among the most promising candidates for the progenitors of bipolar planetary nebulae. We present a list of the optically extended nebulae known

Not Available

Not Available

Not Available

We present first results of the analysis of X-ray data (ROSAT PSPC and HRI pointings) and optical observations of the open cluster NGC 2451. This object consists of two different clusters A and B in the same line-of-sight at distances of 190 and 360 pc, respectively. NGC 2451A is one of the 10 nearest clusters, but has been little studied because