We have extended our evolutionary synthesis models for star forming regions to the γ-ray domain. We obtain the light-curves of γ-ray line emission due to radioactive decay of stellar nucleosynthesis products, such as 26 Al, 60 Fe, or the e- e+ annihilation line as well as the evolution of the kinetic energy from massive stars. We present the

We present preliminary results from the Open Cluster Polarimetric Survey. The aim of the survey is to provide clues about the characteristics of the dust responsible for extinction and polarization in the light from cluster members, about its spatial distribution and also about possible memberships. Our data on linear optical polarimetry were

The maximum exploitation of the excellent astronomical quality of the `Roque de los Muchachos' Observatory is one of the most important design criteria for the GTC Project. The installations of the GTC are being designed in such a way as to minimize local seeing degradation while providing adequate support for the operation and maintenance of the

High quality CCD cameras and powerful PCs are enabling advanced amateur astronomers to make high quality photometric and astrometric observations of a wide variety of solar system objects and to reduce them almost in real time. This has had important consequences for the observation of minor solar system bodies. In particular, new comets down as

The surface magnetic field has substantial influence on various stellar properties that can be probed through various techniques. With the advent of new space-borne facilities such as CoRoT and Kepler, uninterrupted long high-precision photometry is available for hundred of thousand of stars. This number will substantially grow through the

Asteroseismology has proven to be an excellent tool to determine not only global stellar properties with good precision, but also to infer the stellar structure, dynamics, and evolution for a large sample of Kepler stars. Prior to the launch of the mission, the properties of Kepler targets were inferred from broadband photometry, leading to the