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 444317 MS 444318 MS 444319 MS 444320 MS 444321 MS 444322 MS 444323 MS 444324 MS 444325 MS 444326 MS 444327 MS 444328 MS 444329 MS 444330 MS 444331 MS 444332 MS 444333 MS 444334 MS 444335 MS 444336 MS 444337 MS 444338 MS 444339 MS 444340 MS 444341 MS 444342 MS 444343 MS 444344 MS 444345 MD 456649 MD 456650 MD 456651 MD 456652 MD 456653 MD 456654 MD 456655 MD 456656 MD 456657 MD 456658 MD 456659 MD 456660 MD 456661 MD 456662 MD 456663 MD 456664 MD 456665 MD 456666 MD 456667 MD 456668 MD 456669 MD 456670 MD 456671 MD 456672 MD 456673 MD 456674 MD 456675 MD 456676 MD 456677 MD 456678