Decisive evidence is presented against the validity of the conventional linear decay law for sunspots. Preliminary results from a statistical analysis of...

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The presence of compact and massive star clusters is a characteristic property of many starburst and interacting galaxies. Their extreme mechanical and...

Recent results from Hubble Space Telescope (HST) have resolved starbursts as collections of small young stellar clusters. We have elaborated tep{Melo04} a...

Super star clusters (SSCs) are young massive objects typically observed in starburst galaxies. They consist of millions of stars occupying volumes only several...

We summarize our results based on observations with the NIRI camera on the Gemini North telescope of three Hii galaxies (Mrk 36, UM 408 and UM 461), obtained to...

Here we stress some of the major differences between supergalactic winds and giant superbubbles evolving into the giant low density haloes of galaxies. Both...