description Alphard Overview
Alphard, designated Alpha Hydrae, is an orange giant star located approximately 177 light-years from Earth. It is the brightest star in Hydra, which is the largest of the 88 modern constellations by total area. Historically known to astronomers as Cor Hydrae, meaning the heart of the hydra, it marks the physical center of the mythological sea serpent. The star's traditional name derives from the Arabic phrase al-fard, translating to the solitary one, a reference to its prominent appearance in an otherwise relatively faint region of the sky.
help Alphard FAQ
Why is Alphard called "the solitary one"?
The name Alphard comes from Arabic and refers to an individual or solitary star. It appears unusually isolated because Hydra has few other bright stars near its roughly second-magnitude beacon.
Where is Alphard within the constellation Hydra?
Alphard is Alpha Hydrae and represents the heart region of the long water-serpent constellation. Hydra is the largest of the 88 modern constellations by area.
What kind of star is Alphard?
Alphard is an orange giant that has evolved beyond the Sun's present main-sequence stage. It lies roughly 177 light-years away and is cooler at its surface than the Sun, despite being much larger and more luminous.
Can Alphard be seen without a telescope?
Yes, Alphard is readily visible to the unaided eye under ordinary dark skies. Viewers can locate it below Leo during Northern Hemisphere spring, where its isolation makes identification easier.
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