The above image, some twenty second exposure longs, shows the spectrum of Jupiter. It was taken with Shelyak Star Analyserat spectrograph, at the prime focus of a Takahashi Tsa 102/816 refractor telescope. The camera used was the un-modded Eos 40D DSLR . The Star Anayser 100 is a simple blazed diffraction grating spectrograph . Precisely it is a common 31,8 mm filter to screw in fron of the camera; easy but powerful enough to show clearly the first (blazed ) and the second order spectrum. One should use the Star Analyser to study stellar populations, but, with appropriate tolerance , can be used for qualitative work of some complexity, such as: red shift, spectra meteor, quasar, nebuose and other exotic objects. Of course, much of the detail recorded, depends on the gathering of light, and then from ‘aperture of the scope used. Actually only the first order is profitably used during calibration and analysis. To do this one may use RSpec, by Tom Field (very nice person, indeed) or the powerful but still unstable Vspec. Another great piece of software is Isis (Integrated Spectrographic Innovative Software) : so don’t get me wrong, it has nothing to do with islamic fundamentalism….