Full solar disk observations of radial velocity, obtained with the IRIS network of resonant scattering spectrometers, are used to analyze the acoustic p-mode spectrum around the acoustic cut-off frequency. Three different methods are used to determine it; two use the power spectrum, while the third uses the phase spectrum. The three values measured

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The Apollo 17 double drive tube 79001/2 (station 9, Van Serg Crater) is distinctive because of its extreme maturity, abundance, and variety of glass clasts. It contains mare glasses of both high Ti and very low Ti (VLT) compositions, and highland glasses of all compositions common in lunar regolith samples: highland basalt (feldspathic; Al2O3

We have observed a sample of "ordinary" quasars, selected only on the grounds of their relative brightness in the visible, with the Turku Photopolarimeter on the 2.56m Nordic Optical Telescope, on La Palma, Canary Islands. The instrument permits us to obtain simultaneous UBVRI photometry and polarimetry of objects down to 16th magnitude, with the

A detailed insight into the star formation history of a sample of HII galaxies has been obtained, based on radio continuum and optical broad band and narrow band observations. HII galaxies are dwarf galaxies whose optical spectrum resembles that of HII regions, many of which are also known as Blue Compact Dwarf Galaxies. VLA observations at several