IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg)
Hydra
The Hydra
OriginAncient
AbbreviationHya
GenitiveHydrae
Pronunciation/ˈhaɪdrə/ genitive /ˈhaɪdriː/
HIGH-druh
LocationCelestial Equator
Primary StarAlphard (α Hya)
Right Ascention 9h 28m Declination -8° 40'
Martian Solar Lag δ(🜨→♂) +0.272 h (16.3 min)
Hydra represents the Lernaean Hydra, a reptilian monster so vile that even its breath and blood were highly poisonous. It had nine serpent heads, eight mortal and one immortal. Every time one was cut off two would grow in its place. Defeating the Lernaean Hydra was the second labor assigned to Hercules by King Eurystheus. In the marshes of Lerna, Hercules drew out the Hydra from its lair, and with his mighty club, bashed one of its heads in. In its place, two heads sprouted, just as mean and deadly as the original. He realized he would need to take a different approach. He had his nephew Iolaus quickly cauterize each stump after it was bashed in. This prevented the heads from growing back. Hercules did this with each of the mortal heads. He struck off the immortal head and buried it deep in the ground and placed a huge rock on top of it. With his second labor complete, he dipped the tips of his arrows into the blood of the Hydra, covering them with deadly poison. In a second myth involving Hydra, this constellation represents the snake that Corvus used in a lie to Apollo.
www.underthesky.com
Hydra as depicted by Johann Bayer in his Uranometria (1603). Source image provided by www.RareMaps.com — Barry Lawrence Ruderman Antique Maps Inc. Via www.underthenightsky.com.
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MS 400858 MS 400859 MS 400860 MS 400861 MS 400862 MS 400863 MS 400864 MS 400865 MS 400866 MS 400867 MS 400868 MS 400869 MS 400870 MS 400871 MS 400872 MS 400873 MS 400874 MS 400875 MS 400876 MS 400877 MS 400878 MS 400879 MS 400880 MS 400881 MS 400882 MS 400883 MS 400884 MS 400885 MS 400886 MD 411983 MD 411984 MD 411985 MD 411986 MD 411987 MD 411988 MD 411989 MD 411990 MD 411991 MD 411992 MD 411993 MD 411994 MD 411995 MD 411996 MD 411997 MD 411998 MD 411999 MD 412000 MD 412001 MD 412002 MD 412003 MD 412004 MD 412005 MD 412006 MD 412007 MD 412008 MD 412009 MD 412010 MD 412011 MD 412012