The ACS Survey of Galactic Globular Clusters is a Hubble Space Telescope (HST) Treasury program designed to provide a new large, deep and homogeneous...

The progress on the dynamics of the radiative zone by global Doppler velocity measurements aboard SoHO (GOLF+ MDI) and with ground networks (BiSON and GONG)...

The Global Oscillation Network Group (GONG) project is planning to place six observing stations around the world to observe the solar oscillations as...

We briefly review the revised classification of the radial surface brightness profiles focusing on the outer disk structure, discussing possible formation...

The outstanding quality of the Canarian sky, protected by law, makes it feasible to install the largest telescopes in the world at the observatories of the...

The GTC is a 10.4m telescope being built in La Palma, Spain, by a consortium lead by the Instituto de Astrofisica de Canarias (IAC). Other members of the...

The Natural Guide Star Adaptive Optics system for the Gran Telescopio Canarias (GTC) is in its integration phase, and meanwhile the Laser Guide Star update...

The influence of gravitational microlensing on the X-ray spectral line profiles originated from a relativistic accretion disc has been studied. Using a disc...

We have determined the gravitational torque of a sample of 45 galaxies observed at K band with the 4.2m William Herschel Telescope. The results of this sample...