We present optical and millimeter (continuum and molecular) observations of a cometary globule in the Trifid nebula showing clear signs of star formation activity. The globule is associated with a long jet finishing in a large bow shock. The HH jet can be seen in all the popular pictures of the Trifid. It has remained unrevealed although it has

We have performed a study of the rate of recent star formation for a sample of nearby compact groups of galaxies which have been taken from the compilation of Hickson (1982). Our sample included nearly all the compact groups in the Northern Hemisphere presenting more than three galaxies with accordant redshift z

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This contribution is a report on a test campaign carried out by the IAC, in collaboration with Construcciones Aeronauticas, S.A. (CASA) as a main contrac tor, for exploring the capabilities of liquid crystal variable retarders (LCVRs) to be u sed in future space missions as the core of the modulation package of a polarimetric device, used as a post