The peculiar giant extragalactic HII region NGC 588 has been observed with the TAURUS Fabry-Perot Spectrograph at the William Hershell Telescope of the Observatorio del Roque de los Muchachos. Velocity maps at the seeing limit were obtained in the lines of Hα and [OIII]lambda 5007. We have studied the kinematics of the gas and its relation with the

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We study the photoionization of the Extended Narrow Line Region (ENLR) using three anisotropic radiation fields: (1) a geometrically thick accretion disk; (2) a large (at 1 pc to the nucleus) obscuring torus; (3) a blazar beam produced by a relativistic jet. The variation of the intensity of several emission lines with the inclination angle with

We have used the TAURUS Fabry-Perot imaging spectrograph at the William Hershell Telescope of the Observatorio del Roque de los Muchachos to study the kinematics of the HII regions in the central zone of the irregular galaxy NGC 4449. Velocity maps have been obtained in the lines of Hα and [OIII]lambda 5007. Those maps allow us to study the

A popular description of the Titan Satellite of Saturn is given. Some recommendations for its observation are given. The space programs in view of its exploration are also described.

The evolution of an SNR in a high-density medium has been studied using analytical and numerical hydrodynamic and photoionization models. The models show that SNR properties (luminosity, density, size, kinematics, emission line ratios, etc.) are essentially identical to those considered typical of the broad-line region (BLR) of radio-quiet active