Remote archaeoastronomical analysis of the town-planning of the Roman Aosta

For what concerns the astronomical orientations of architectural complexes, a preliminary analysis can be made by considering the local astronomical horizon, to evidence the possible existence of alignments along the rise or setting of the sun, the moon or some bright stars. This analysis can be easily performed using satellite imagery and software for the simulation of astronomical events. In the case of a positive result, that is, that an astronomical alignment is possible, a further analysis can be made by means of the local natural horizon. Actually, also this further analysis can be obtained by means of software. Here we show that using Google Earth, a remote archaeoastronomical analysis is possible. The case study considered is that of the Roman Aosta