We present deep broadband R and narrowband Hα images of Stephan's Quintet. The observations in the R band show that the diffuse halo of Stephan's Quintet is larger than previously thought and extends out to NGC 7320C. However, we have not found emission connecting NGC 7331 and NGC 7320 to R~26.7 mag arcsec-2 (at more than a 3 σ level), so there is

Comet C/2000 WM1 (LINEAR) was observed at ESO when it had its closest approach to the Earth at the beginning of December 2001 (geocentric distance: 0.32 AU). The aim of the observations was the characterization of the solid component of the coma in order to better understand the origin and the correlation between most aspects of this component. The

We describe an ongoing program dedicated to the observation and physical characterization of Near Earth Objects (NEOs) using night facilities of Observatorio del Teide (Instituto de Astrofisica de Canarias, Tenerife, Spain). We are observing NEOs with the aim of doing recovery and follow-up astrometry, of studying their rotational properties using

A high resolution P-wave image of Mt. Vesuvius edifice has been derived from simultaneous inversion of travel times and hypocentral parameters of local earthquakes, land based shots and small aperture array data. The results give details down to 300-500 m. The relocated local seismicity appears to extend down to 5 km below the central crater

During Dec. 2-4, 2001, the comet C/2000 WM1 (LINEAR) was observed at ESO by using the 1.5m Danish Telescope equipped with DFOSC as focal plane. The comet was imaged in broad-band filters (R,I) and interferometric filters covering the CN, C2, C3 gas emissions as well as clear continuum regions. Additionally, long-slit spectra were also taken as part

Some observations suggest that quiescent solar prominences can be considered as composed by small-scale loops, or fibrils, which are stacked one after another in both the vertical and horizontal directions. In a previous work we studied, in Cartesian geometry, the propagation of fast MHD waves in a two-dimensional magnetostatic model representing