A comparative study of the statistical properties of granulation in active and quiet regions is performed. The analysis is based on a high-resolution time series of simultaneous white light (lambda5425 Å) and G-band (lambda 4308 Å) images obtained at the Swedish Vacuum Solar Telescope, La Palma, Canary Islands. The G-band images have been used to

A comparative study of the statistical properties of granulation in active and quiet regions is performed. The analysis is based on a high-resolution time series of simultaneous white light (lambda5425 Å) and G-band (lambda 4308 Å) images obtained at the Swedish Vacuum Solar Telescope, La Palma, Canary Islands. The G-band images have been used to

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Globular clusters are spherical, densely packed groups of stars found around galaxies. They are thought to have formed at the same time as their host galaxy and thus provide a powerful probe for understanding galaxy evolution, as well as being studied as objects of interest in their own right. This volume presents invited articles reviewing our

We report the result of the HST snapshot survey of BL Lac host galaxies. Almost 100 sources with redshift ranging from 0.05 to 1.2 were observed. Virtually all source at z

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