The results of optical spectroscopy and photometry from La Palma (Canary Islands) of V404 Cyg are presented. They correspond to the optical counterpart of the new X-ray transient GS2023+338 discovered by Ginga. The overall light curve is similar to that of the previous optical outburst of this object, recorded as Nova Cyg 1938 and classified as a

IAUC 4898 available at Central Bureau for Astronomical Telegrams. IAUC 4898 available at Central Bureau for Astronomical Telegrams.

Regions of high excitation gas were detected around various active galactic nuclei. Their shape resembles a cone whose axis is oriented close to the radio axis. The radiation emitted by the nucleus may be responsible for the high ionization of the line emitting gas. Moreover there is evidence that the radiation field should be anisotropic and

The regions of high excitation gas detected around various Active Galactic Nuclei (AGN) are examined. The radiation emitted by the nucleus may be responsible for the high ionization of the line emitting gas. Evidence that the radiation field is anisotropic and collimated in a direction close to the cone axis is found. The possibility that a

LA MEMORIA PRESENTADA POR D. ANTONIO FERRIZ MAS ES UN TRABAJO TEORICO ORIGINAL Y RIGUROSO SOBRE DIVERSOS ASPECTOS MATEMATICOS Y FISICOS DE LA DINAMICA DE UN PLASMA CONFINADO EN UN TUBO DE FLUJO MAGNETICO INTENSO. EL AUTOR DE ESTA MEMORIA, EN UN ESTUDIO EMINENTEMENTE TEORICO, LOGRA SUS OBJETIVOS CIENTIFICOS MEDIANTE CALCULOS ANALITICOS, UTILIZANDO

LA ASTROSISMOLOGIA O SISMOLOGIA ESTELAR ESTUDIA EL ESPECTRO DE MODOS PROPIOS DE OSCILACION DE LAS ESTRELLAS CON EL OBJETIVO PRINCIPAL DE PROPORCIONAR INFORMACION SOBRE LA ESTRUCTURA INTERNA DE LAS MISMAS Y SU ESTADO EVOLUTIVO. COMO TAL, ES UNA CIENCIA SUMAMENTE JOVEN PUES DATA, TAN SOLO, DE LA ULTIMA DECADA (1979-89), AUNQUE SE LA PUEDE CONSIDERAR