Eridanus is a constellation in the southern celestial hemisphere. It is represented as a river. One of the 48 constellations listed by the 2nd century astronomer Ptolemy, it remains one of the 88 modern constellations. It is the sixth largest of the modern constellations, and the one that extends farthest in the sky from north to south. The same name was later taken as a Latin name for the real Po River and also for the name of a minor river in Athens.
The constellation of Eridanus, the river, as seen by the naked eye from northern latitudes.
Artist's impression of a Jupiter-mass planet orbiting the nearby star Epsilon Eridani
Cetus dips his paws into Eridanus in this plate from Urania's Mirror (1825).
The Po is the longest river in Italy. It flows eastward across northern Italy, starting from the Cottian Alps. The river's length is either 652 km (405 mi) or 682 km (424 mi), if the Maira, a right bank tributary, is included. The headwaters of the Po are a spring seeping from a stony hillside at Pian del Re, a flat place at the head of the Val Po under the northwest face of Monviso. The Po then extends along the 45th parallel north before ending at a delta projecting into the Adriatic Sea near Venice.
The Po in Turin, Piedmont
Flamingoes in the Po Delta Regional Park.
The Po in San Mauro Torinese in July 2012.
Protected ecological rebalancing area on the Stellata in Mesola and Cavo Napoleonico