A 2-D global hybrid simulation is carried out to study the structure of the dayside magnetopause in the noon-midnight meridian plane associated with magnetic reconnection. In the simulation the bow shock, magnetosheath, and magnetopause are formed self-consistently by supersonic solar wind passing the geomagnetic field. The reconnection events at

The GOLF experiment on the SOHO mission aims to study the internal structure of the sun by measuring the spectrum of global oscillations in the frequency range 10-7 to 10-2 Hz. Bothp andg mode oscillations will be investigated, with the emphasis on the low order long period waves which penetrate the solar core. The instrument employs an extension

We have analyzed archival Hubble Space Telescope Advanced Camera for Surveys images in g and z of the globular cluster (GC) systems of 53 ellipticals in the Virgo Cluster, spanning massive galaxies to dwarf ellipticals (dEs). Several new results emerged. (1) In the giant ellipticals (gEs) M87 and NGC 4649, there is a correlation between luminosity

The Global Oscillations at Low Frequency: New Generation instrument (GOLF-NG), the successor of GOLF aboard SoHO, is devoted to the study the dynamics of the solar radiative zone thanks to the detection of solar gravity modes and low-frequency acoustic modes. This instrument built under a French-Spanish collaboration, is based on the Doppler

We present U and B galaxy number counts from a field that comprises a 0.29 square degrees area of sky, and which covers the Groth-Westphal Strip (Groth et al.,1994). Reached 50% limiting magnitudes are 24.8 magnitudes in U and 25.5 in B in the Vega system, which makes our U number counts to have the biggest area×depth product at the moment. These

First light of the Gran Telescopio Canarias (GTC) is reviewed by Francisco Sánchez Martínez, encourager of such an endeavour which is today a reality.