Eridanus can refer to:

Rivers

Eridanos (mythology) The river Eridanos or Eridanus (; ) is, both, the name of a river in Northern Europe mentioned in Greek mythology and historiography, and the name of the god of said river. Mythical stream Hesiod, in the ''Theogony,'' calls it "deep-eddying E ...

(or Eridanus), a river in Greek mythology, somewhere in Central Europe, which was territory that Ancient Greeks knew only vaguely *The

Po River The Po ( , ) is the longest river in Italy. It flows eastward across northern Italy, starting from the Cottian Alps. The river's length is , or if the Maira (river), Maira, a right bank tributary, is included. The headwaters of the Po are forme ...

, according to Roman word usage *

Eridanos (Athens) The Eridanos or Eridanus (; ) was a river in Athens mentioned in Greek mythology and historiography. Mythical stream Eridanus was the 'deep-swirling' river-god son of the Titans Oceanus and his sister-wife Tethys. He was the father of Zeu ...

, a former river near Athens, now subterranean *

Eridanos (geology) Eridanos () was an ancient river which once flowed through the current Baltic Sea. Its river system is also known as the "Baltic River System". Etymology Eridanos() is a mythonymic toponym given by geologists in honor of the Ancient Greek myt ...

, a former large river that flowed between forty million and seven hundred thousand years ago from Lapland to the North Sea through where the Baltic Sea is now

Astronomy

Eridanus (constellation) Eridanus is a constellation which stretches along the southern celestial hemisphere. It is represented as a river. One of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, it remains one of the 88 modern constellations. It i ...

, a southern constellation *

Eridanus Cluster The Eridanus Cluster is a galaxy cluster roughly from Earth, containing about 73 main galaxies and about 200 total galaxies. About 30% have Hubble classifications of elliptical or S0 and the remaining 70% are spiral or irregular. These galax ...

of galaxies in the constellation Eridanus *

Eridanus II The Eridanus II Dwarf is a low-surface brightness dwarf galaxy in the constellation Eridanus. Eridanus II was independently discovered by two groups in 2015, using data from the Dark Energy Survey ( Bechtol et al., 2015; Koposov et al. 2015). ...

, a low-surface brightness dwarf galaxy in the constellation Eridanus *

Eridanus Supervoid The CMB Cold Spot or WMAP Cold Spot is a region of the sky seen in microwaves that has been found to be unusually large and cold relative to the expected properties of the cosmic microwave background radiation (CMBR). The "Cold Spot" is approx ...

, a large-scale cosmic underdensity

Miscellaneous

Éridan (rocket) The Éridan is a two-stage French sounding rocket, which results from the use of the ''Stromboli'' engine (also used on the Dragon and Dauphin) for the first and second stages. It belonged to a family of solid-propellant rockets that also enc ...

, a French rocket *''

Eridanosaurus ''Eridanosaurus'' is an extinct genus originally described as a crocodilian, but later shown to be a rhinocerosDelfino, M. 2001The fossil record of the Italian Crocodylomorpha 6th European Workshop on Vertebrate Palaeontology, Florence-Montevarc ...

'', a rhinocerotid originally described as a crocodilian * Eridan Ampora, a character from the webcomic ''

Homestuck ''Homestuck'' is an Internet fiction series created by American author and artist Andrew Hussie. The fourth and best-known of Hussie's four ''MS Paint Adventures'', it originally ran from April 13, 2009, to April 13, 2016. Though normally describ ...

'' (2009-2016)

Ships

* a French cargo liner in service 1928-56 * ''Éridan''-class minehunter, a class of French naval minehunters * USS ''Eridanus'' (AK-92), a ship of the United States Navy {{disambiguation, geo