Eridanus
Eridanus (Eridani)
Eridanus, the River, is the sixth-largest constellation, winding from near Orion's foot almost to the south celestial pole. This long, meandering constellation represents a celestial river and terminates at Achernar, the ninth brightest star in the sky. Eridanus is rich in galaxies and contains some notable astronomical objects.
📜 Mythology
Eridanus represents a celestial river, often associated with the Po River in Italy or the Nile in Egypt. The most famous myth connects it to Phaethon, son of the sun god Helios. When Phaethon demanded to drive his father's sun chariot across the sky, he lost control of the immortal horses. To prevent Earth from burning, Zeus struck him down with a thunderbolt, and Phaethon fell into the river Eridanus. His sisters, grieving on the riverbank, were transformed into poplar trees, their tears becoming amber.
💡 Facts
- ✦Achernar is one of the flattest stars known, spinning so rapidly it bulges 50% wider at its equator than at its poles
- ✦Epsilon Eridani is one of the nearest Sun-like stars with a known planetary system, only 10.5 light-years away
- ✦The Eridanus Supervoid is one of the largest known structures (or absences) in the universe