We calculated new estimates of the Delta VHBbump parameter for 15 Galactic Globular Clusters (GGCs) using accurate ground-based photometric data. We enlarged our sample with literature data and we obtained a sample of 62 GGCs covering a wide metallicity range (-2.16le [M/H]le -0.58 dex). To compare the data with the theory we used theoretical

The MAGIC Observatory is one of the main instruments in the northern hemisphere for mea-suring gamma rays from celestial objects in the very high energy regime. It consists of two 17m diameter IACTs (Imaging Atmospheric Cherenkov Telescopes) with a baseline of 85m sited at 2200 m.a.s.l. on Roque de los Muchachos (European Northern Observatory, La

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We present a coordinated study of the complex star forming region NGC 6334 including a wide range of observations from radio to X-ray.

Detailed observations of the second solar spectrum have shown a complex phenomenology whose detailed interpretation is still in a preliminary phase. The only certain thing is that the observed polarization is due to the phenomenon of resonance scattering. It is well known that such polarization can be strongly modified by the presence of a magnetic

A lunar eclipse offers a unique opportunity to investigate the Earth's atmosphere. Even at its darkest, the Moon in umbra is still lit by solar photons refracted and scattered during their passage through the Earth's terminator. A recent ground-based observation of the 16 Aug 2008 eclipse [1] has shown that the spectrum of the light reflected from