Two-dimensional simulations of the evolution of supernova remnants in a uniform, high-density medium are presented. The medium is magnetized, and its magnetic pressure is much larger than the thermal pressure. The evolution of the remnants is followed past full thermalization of the ejecta. A mechanism of self-collimation of the flow is identified

We present a precise procedure for obtaining predictions of any clustering model for the density of Abell clusters. To this end we use results from the recently developed theory of structures in point distributions. The procedure is applied to two clustering models. One of them gives a result very close to the actual one.

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Absolutely calibrated measurements of the reflectivity of Saturn in 1992 are presented. The observations were carried out using a Circular Variable Filter in combination with a photometer with a single element InSb detector at the 1.54m Carlos Sanchez infrared telescope of the Observatorio del Teide in the Canary Islands (Spain). The spectral

The Instituto de Astrofisica de Canarias (IAC) has presented the proposal for the Observatorio Roque de los Muchachos (ORM) 8 m telescope. As a part of this project, we have proposed a distributed control system using the Controller Area Network (CAN) protocol for the control of hundreds of force actuators for the support of the 8 m diameter thin

The Instituto de Astrofisica de Canarias (IAC) is taking preliminary steps towards the building of an 8-m class optical-infrared telescope to be placed at the Observatorio del Roque de Los Muchachos (ORM) on the island of La Palma in the Canary Islands, Spain. This paper presents a brief description of the preliminary conceptual design of the