Cyclic spectroscopic observations of the dark and bright sides of the moon (or earthshine and moonshine) have been carried out in the visible spectral region from several astronomical observatories as Earth rotates. The ratio of the earthshine to moonshine has been analyzed to determine the globally-integrated Earth's albedo during the observations

Using data from two dense array of short period seismometers, we analyse the kinematic properties of volcanic tremor preceding and accompanying the 2004-2005 eruption of Etna Volcano, Italy. Results from slowness analyses indicate the action of at least two distinct sources. The first dominates the pre-eruptive period, and is likely associated with

We present results from observations made at 33 GHz with the Very Small Array (VSA) telescope towards potential candidates in the Galactic plane for spinning dust emission. In the cases of the diffuse HII regions LPH96 and NRAO591 we find no evidence for anomalous emission and, in combination with Effelsberg data at 1.4 and 2.7GHz, confirm that

Flux tube on the sun may carry linear and torsional Alfven waves generated by photospheric motion. Photospheric motion of 2 km/s would provide magnetic fluctuation of 40G for 1KG tube and for the Alfven speed of 50km/s. This may be close to the detection limit of the Stokes Q and U signals for flux tubes located in the sun center. However, for flux

Context: The variable pre-white dwarf PG 1159 stars (GW Vir) are g-mode non-radial pulsators. Asteroseismology puts strong constraints on their global parameters and internal structure. PG 0122+200 defines the red edge of the instability strip and its evolutionary timescale is predicted to be dominated by neutrino emission. Its study offers the

Aims:In light of recent contradictory observational results concerning the atomic polarization of solar H I lines, our purpose is to present certain collisional effects that might contribute towards a possible explanation. In particular, we aim to draw attention to the possibility of creating the "impact circular polarization". Methods: A general