Eridanus


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Eridanus

(ĭrĭd`ənəs), large southern constellationconstellation,
in common usage, group of stars that appear to form a configuration in the sky; properly speaking, a constellation is a definite region of the sky in which the configuration of stars is contained.
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 stretching SW from Orion for about 60°. Because of its long, winding shape it was identified with a river by many ancient civilizations; e.g., the Egyptians called it the Nile and the Babylonians called it the Euphrates. The brightest star in the constellation, AchernarAchernar
, brightest star in the constellation Eridanus; Bayer designation α Eridani; 1992 position R.A. 1h37.4m, Dec. −57°16'. A bluish-white white star with apparent magnitude 0.51, it is one of the 10 brightest stars in the entire sky.
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, marks the southern end of the river. Eridanus reaches its highest point in the evening sky in December.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

Eridanus

(e-rid -ă-nŭs) (River) A long straggling constellation in the southern hemisphere extending from Orion toward the southern polar region. Except for the zero-magnitude Achernar (α), the brightest stars are of 2nd and 3rd magnitude. Zaurak (γ) is a red giant of apparent magnitude 2.95 and spectral type M1 IIIb, while Rana (δ) is somewhat hotter, an orange subgiant of apparent magnitude 3.54 and spectral type K0 IV. To the northwest of Zaurak lies Epsilon (Ɛ) Eridani, a star close to the Sun that may be a planetary system in the making (see Epsilon Eridani). The 3rd-magnitude Acamar (θ) is a fine double star, possibly once much brighter than it is now. Abbrev.: Eri; genitive form: Eridani; approx. position: RA 1.5 to 5h, dec 0° to –58°; area: 1138 sq deg.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Eridanus

 

a constellation of the southern hemisphere; its brightest star, Achernar, has a visual stellar magnitude of 0.5. The constellation is most easily viewed in October and November; it is visible in part from all regions of the USSR. (SeeSTELLAR SKY.)

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

Eridanus

[‚er·ə′dan·əs]
(astronomy)
A southern constellation made up of a long, crooked line of stars beginning near Rigel in the foot of Orion, and winding west and south to the first-magnitude star Achernar. Abbreviated Eri; Erid. Also known as River Po.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Eridanus Capital LLC is an affiliate of Myrmikan Capital, LLC, which operates in the gold and silver junior mining sector.
Eridanus opens up an entirely new dimension of blockchain layer-2 scalability with real-time and zero-fee interaction, instant micro payments, and low-latency interoperability for dApps.
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Borderline members include Delphinus, the Dolphin; and Eridanus, likely the River Euphrates that flowed by ancient Eridu.
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For this body of work, he received a Baader Planetarium 3.5mm Eudiascopic eyepiece, courtesy of Eridanus Optics.
On 24 October 2012 observatories across the world were alerted about a huge stellar explosion, the GRB121024A, which had been located just hours before in the Eridanus constellation by NASA's Swift satellite.
Moreover, "Eridanus", which is evoked metaphorically by Lowry both in his novel Under the Volcano and in his stories of Hear us O Lord from Heaven Thy Dwelling Place, refers to the archaic name of the Italian river Po, as Lowry himself explains in the story "The Forest Path to the Spring" (HL 227).
The south is dominated by the brilliant display of winter constellations that are in such contrast to the previous incumbents of the meridian, Eridanus and Cetus.
I told them that Orion stands on the banks of the Eridanus River, accompanied by his faithful dogs, Canis Major and Canis Minor, and together they roam the night sky, hunting Lepus, the rabbit, and Taurus, the bull.

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