Recent results suggest that there is a group of trans-Neptunian objects (TNOs), 2003 EL61 being the biggest member, with similar dynamical and physical characteristics (Brown et al. 2007, Pinilla-Alonso et al. 2007). All these objects are concentrated in a narrow region of the orbital parameters space (41.6 a 43.6 AU, 25.8 i 28.2 deg, 0.10 e

The Isaac Newton Telescope H-alpha survey (IPHAS) of the northern galactic plane is near completion. The photometric (H-alpha, R, I) catalogue and the mosaic images database have been searched for new Planetary Nebulae. We present the results for the RA=18 to 20 hr region, the first analyzed so far. More than 250 PNe candidates are discovered

The COROT space mission will monitor several target fields for up to 150 days to perform asteroseismology and to search for extrasolar planets by photometric transits. Variable stars in the target fields are important objects for additional scientific studies but can also disturb the search for planetary transits. A variability characterization of

Context: Previous studies have indicated that the 372.4 GHz ground transition of ortho-H2D+ might be a powerful probe of Proto-Planetary Disks. The line could be especially suited for study of the disk mid-plane, where the bulk of the mass resides and where planet formation takes place. Aims: Provide detailed theoretical predictions for the line

We present the results obtained from our deep survey of lensing clusters aimed at constraining the abundance of star-forming galaxies at z˜6 11.

Globular Clusters (GCs) provide crucial constraints on theories of the formation of galaxies as well as the amount and distribution of Dark Matter (DM) found in galaxies. We request time to extend our survey of nearby elliptical galaxies in high density and low density environments with observations of the globular cluster system of the nearby