The range of masses for the compact object in binary r-X 2S 0921-630 has been determined (between 2.0-4.3 solar masses), consistent with a massive neutron star or a low-mass black hole.

Windspeed readings taken by satellite at a height of 200 mbar (some 12 km), which have been proposed as an indicator of the observation quality of a site, give excellent results (speed, homogeneity) for our observatories. This confirms the quality of the ORM and OT for Adaptive Optics (OA). The figures are given beneath the photograph.

Most of the solar surface seems to be non-magnetic. However, it carries a magnetic flux and energy that easily exceed those of sunspots, plage and network all together. The solar magnetism studied so far represents only the 'tip of the iceberg'. The rest, known as 'magnetism of the quiet Sun' is been studied and characterized. The solar physicists of the IAC have played a leading role in this characterization, and the paper this highlight refers to points out a good example. Using the SST at the ORM, Sanchez Almeida et al. discovered, for the first time, magnetic bright points in the quiet

A public programme (IAC-STAR) has been developed for generating of HR and C-M synthetic diagrams to investigate problems of star formation and population synthesis. The programme's outputs have multiple applications: from use as tools for studying the History of Star Formation in the galaxies, to applications in the field of Surface Brightness Fluctuation. IAC-STAR is a free access project via the World Wide Web from the url http://iac-star.iac.es/iac-star and is proving to be very successful.

A planet the size of Jupiter (TrES-1) has been detected from its transits around a star K0 V. (Data: M=0.75 ± 0.07 MJ R= 1.08 (+0.18,-0.04) RJ ). This is the first planet discovered using the transit technique with a small telescope. It is currently the second best-known extrasolar planet, and one of two from which direct thermal emission (light emitted by the planet) has been detected.

An investigation carried out at the IAC has demonstrated that the apparently non-magnetic regions of the solar photosphere (the innermost region of the atmosphere of the Sun) are instead permeated by a "chaotic" magnetic field of very significant intensity, which implies the presence of a vast amount of "hidden" magnetic energy in the quiet solar photosphere. This investigation required to develop first a novel diagnostic technique of magnetic fields, which is based on three-dimensional numerical simulations of the Hanle effect in atomic and molecular lines. For more information see the