The heart of the telescope is an f/1.0 honeycombed construction, borosilicate primary mirror. The mirror was manufactured at The University of Arizona's Steward Observatory Mirror Laboratory[1], which pioneered both the spin-casting and the stressed-lap polishing techniques which are being used for telescope mirrors that include the 6.5 meter aperture MMT and Magellan telescopes and the two 8.4 meter mirrors of the Large Binocular Telescope. The VATT's mirror is unusually 'fast', f/1, which means that its focal distance is equal to its diameter. Because it has such a short focal length, a Gregorian design could be employed which uses a concave secondary mirror at a point beyond the primary focus; this allows unusually sharp focusing across the field of view.
The unusual optical design and novel mirror fabrication techniques mean that both the primary and secondary mirrors are among the most exact surfaces ever made for a ground-based telescope. In addition, the skies above Mount Graham are among the most clear, steady, and dark in the continental North America. Seeing of better than one arc-second even without adaptive optics can be achieved on a regular basis.
Sistine Chapel (Latin: Sacellum Sixtinum; Italian: Cappella Sistina) is the best-known chapel in the Apostolic Palace, the official residence of the Pope in the Vatican City.
Image 5The Apostolic Palace (Palazzo Apostolico), the official residence of the Pope. Here, Benedict XVI is at the window marked by a maroon banner hanging from the windowsill at centre. (from Vatican City)
Image 24A monument to Fr. Maximilian Kolbe, among the estimated 3,000 members (18%) of the Polish clergy who were killed by the Nazis; of these, 1,992 died in concentration camps. (from Vatican City during World War II)
... that the Vatican selected Mary Milligan in 1987 to be one of only three U.S. experts to assist the International Synod of Bishops on the Laity in Rome?