Eridanus

Eridanus is the sixth largest constellation, winding from near Orion's foot far into the southern sky. Its southernmost star, Achernar, is the ninth brightest star in the sky and one of the flattest stars known due to rapid rotation. It also contains Epsilon Eridani, one of the nearest Sun-like stars with a confirmed exoplanet.

Location in the Sky

When to Observe

Eridanus is best observed during December. It is located in the SQ1 quadrant and is primarily visible from the both hemispheres. The constellation contains 24 main stars forming its asterism, with 24 Bayer/Flamsteed designated stars in total. Its brightest star is Achernar.

Mythology & History

In Greek mythology, Eridanus represents the river into which Phaethon fell after losing control of his father Helios's sun chariot. Zeus struck Phaethon with a thunderbolt to prevent the chariot from scorching the Earth. The constellation has also been associated with the Nile, Euphrates, and Po rivers.