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In this paper we mainly aim at the understanding of temporal evolution and spatial characterization of solar granular and supergranular features. For this purpose we apply an automatic feature-tracking algorithm to three different solar granulation timeseries and to a supergranular timeseries of near-surface divergence fields. The single lifetimes

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Emission line galaxies are the most easily detected and studied objects in the high redshift Universe. They are being used to trace the evolution of the critical observables of the Universe such as star formation rate densities, starburst properties, and abundances. The GTC will be a very powerful tool for studying the evolution of emission line

OTELO (OSIRIS Tunable Emission Line Object survey) is a project aimed at studying the low end luminosity function of emission line galaxies. A broad band survey at B ≈ 24 magnitudes detection level will also be performed for a field of view of about 14 square degrees corresponding to the lowest selected redshift (z = 0.08). This huge amount of data

The most prominent feature in the interestellar medium extinction curve is the UV bump at 217.5 nm. The carrier of this band has been frequently associated to some form of carbonaceus material but there is no definitive conclusion on the ultimate responsible of the band. The increase in the extinction at higher energies and the existence of many