Decisive evidence is presented against the validity of the conventional linear decay law for sunspots. Preliminary results from a statistical analysis of Debrecen Photoheliographic Results data show that the decay rate of sunspots is significantly slower in late phases of the decay than in earlier phases. Our findings are compatible with the

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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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