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Eridanus


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An extensive constellation, the sixth-largest, representing a river running from the celestial equator deep into the southern sky. Its brightest star is Achernar (Alpha Eridani). Epsilon Eridani, magnitude 3.7, is a K2 dwarf only 10.5 l.y. away. Omicron-2 Eridani, also known as 40 Eridani, magnitude 4.4, is accompanied by a magnitude 9.5 white dwarf, the most easily seen white dwarf in the sky. Theta Eridani (Acamar) is an attractive double star, as is 32 Eridani, magnitudes 4.8 and 6.1.

Subjects: Astronomy and Astrophysics.


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