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A star in the constellation Eridanus that is one of the brightest stars in the sky and is 114 light years from Earth.

[From Arabic 'aḫīr an-nahr, the end of the river (referring to the star's position in the constellation Eridanus) : 'aḫīr, last, end; see ʔḫr in Semitic roots + al-, the + nahr, river; see nhr in Semitic roots.]


(Astronomy) the brightest star in the constellation Eridanus, visible only in the S hemisphere. Visual magnitude: 0.5; spectral type: B3V; distance: 144 light years
[from Arabic ākhīr al-nahr, literally: end of the river, alluding to the star's location in the constellation]
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References in periodicals archive ?
Achernar marks the southern end of Eridanus (the River), which meanders high overhead, ending at the feet of Orion the Hunter.
This gives a path from just below Triangulum Australis, directly towards Achernar, which was probably below the line of hills Bennie refers to and hence not visible at the time.
I managed to find Cetus, and from there traced Eridanus down to Achernar, and Aquarius with Piscis Australis.
Astronomers have discovered that the bright stars Altair and Achernar also spin so fast that they're not round.
Sirius, Canopus, Alpha Centauri system, Arcturus, Vega, Capella system, Rigel, Procyon, Achernar, Betelgeuse
At the Southern end of the river is the Star Achernar, which rules everyone born between March 1st and 12th.
Although astronomers already knew that Achernar spins at least 225 kilometers per second, they were flat-out astonished by their newest observations.
All Indian Ocean navigators favored the use of stars on the meridian for determining latitude: first the Pole Star, and when that star was beclouded or below the horizon, they switched to some other star at culmination,(5) such as |Beta~ Ursae Minoris (the Greater Farqad), the brightest star in the vicinity of the North Pole, or Achernar (sulbar) in the Southern Hemisphere.
Achernar in the central Transantarctic Mountains, are at about 82 degrees south latitude.
The south celestial pole can be found midway along the line joining Crux to Achernar.