We present the GTC data processing subsystem, hereinafter ``Data Factory''. The main objectives, functionality and overall philosophy are described. We also briefly outlay the architectural description of the Data Factory and its organization. The current state of development is also presented as well as some real reduction examples.

We report the first extrasolar planet, ET1, detected with a new generation Doppler instrument, called Exoplanet Tracker. This planet has a minimum mass of 0.41 Jupiter masses and orbits a V = 8.1 K0V star with a 4.8 day period. The planet was identified using the KPNO Coude Feed 0.9 meter telescope in spring 2005. This is the first time an

The study of the Extremly Red Objects (EROs), is the importance for setting constraints on the first epoch of massive galaxy formation, for exploring the population of dust reddened starburst and for testing models of galaxy formation in general. They are defined as objects with I-K>4(Vega). The traditional picture identifies the EROs either with

ELMER is a multi-purpose instrument for the GTC designed for both, imaging and spectroscopy in the visible range. The detection subsystem consists of a single E2V Technologies CCD44-82 detector mounted in a LN[2] cooled CCD camera and a SDSU-II CCD controller with parallel interface. The design including the low-noise fan-out electronics has been

The Roque de Los Muchachos Observatory (ORM) played a substantial role in the Deep Impact campaign. Several telescopes were used to follow up comet 9P/Tempel1 before the impact and the five largest telescopes of the ORM were used simultaneously to track the impact itself in an unprecedented way.

Spectroscopic studies of stars with and without planetary systems have concluded that planet hosts are more metal-rich. This enrichment is also seen in the other chemical elements studied and is likely to be primordial in nature. Interesting trends of different chemical elements begin to appear as the number of extrasolar planets continues to grow