Settimo San Pietro, Settimu in Sardinian language, is a comune (municipality) of the Cagliari metropolitan area in the Province of Cagliari in the Italian region Sardinia, located about 9 kilometres (6 mi) northeast of Cagliari, it had a population of 6,532 (2011 census) and an area of 23.2 square kilometres (9.0 sq mi).
Population: 6,361
Latitude: 39° 17' 27.96" N
Longitude: 9° 11' 8.52" E
The Osservatorio Astronomico di Cagliari (Cagliari Observatory, OAC) is an astronomical observatory owned and operated by Italy's Istituto Nazionale di Astrofisica (National Institute for Astrophysics, INAF). It is located 20 km away from Cagliari i…