Investigaciones realizadas desde el Observatorio del Roque de los Muchachos demuestran que el objeto transneptuniano 2005 FY9 es muy similar al histórico último "planeta" del Sistema Solar

Estos resultados se publican hoy 12 de enero en un artículo de la revista Astronomy and Astrophysics que ya recibió una atención especial previa en la revista Nature el pasado 5 de enero

Utilizando una técnica innovadora, un grupo de astrofísicos estadounidenses y del IAC descubren un planeta en órbita alrededor de una estrella joven situada a unos 100 años luz de distancia

Using the IAC's Beowulf group of computers and the National Supercomputing Centre's Mare Nostrum, an IAC team has simulated the process of galaxy fusion by tracking the trajectory and interactions of more than a million particles. These simulations have made it possible to reproduce the behaviour of stellar velocities in elliptical galaxies.

LIRIS, the IR imaging camera and spectrograph built by the IAC, is giving life to new projects. During 2006 advances were made in the search for and analysis of IR clouds. RSG1 is shown in Figure 1. It is a cloud with fourteen red supergiants, (indicated in the figure, together with the relative coordinates at the centre of the cloud), implying that the it has a mass of 2-4 x 104 M¤. This would make it one of the most massive clouds in the Milky Way. Figure II shows the cloud ID066. The centre of the cloud can be seen with an extinction zone around it, which could have come from the original

Using images from the HST archive of the Ha and [OIII] l5007A emission lines that are 6.84 years apart, variability in the temperature and density of ionized gas has been detected in intervals of one hundredth of a pc. The temperature variations are in the order of tens of degrees centigrade. Possible mechanisms for explaining this variability have been put forward, including the reconnection of magnetic fields induced by supersonic turbulence in the HII region. At the same time, it has been possible to detect and map the field of motion of gas driven by young or forming stellar winds