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.
←Hydra 854→
SolPhoDeiTerVenJovSat
1234567
891011121314
15161718192021
22232425262728
1 Hydra 854 2 Hydra 854 3 Hydra 854 4 Hydra 854 5 Hydra 854 6 Hydra 854 7 Hydra 854 8 Hydra 854 9 Hydra 854 10 Hydra 854 11 Hydra 854 12 Hydra 854 13 Hydra 854 14 Hydra 854 15 Hydra 854 16 Hydra 854 17 Hydra 854 18 Hydra 854 19 Hydra 854 20 Hydra 854 21 Hydra 854 22 Hydra 854 23 Hydra 854 24 Hydra 854 25 Hydra 854 26 Hydra 854 27 Hydra 854 28 Hydra 854 1 Corvus 854 27 September 3217 28 September 3217 29 September 3217 30 September 3217 1 October 3217 2 October 3217 3 October 3217 4 October 3217 5 October 3217 6 October 3217 7 October 3217 8 October 3217 9 October 3217 10 October 3217 11 October 3217 12 October 3217 13 October 3217 14 October 3217 15 October 3217 16 October 3217 17 October 3217 18 October 3217 19 October 3217 20 October 3217 21 October 3217 22 October 3217 23 October 3217 24 October 3217 25 October 3217 26 October 3217
MS 423591 MS 423592 MS 423593 MS 423594 MS 423595 MS 423596 MS 423597 MS 423598 MS 423599 MS 423600 MS 423601 MS 423602 MS 423603 MS 423604 MS 423605 MS 423606 MS 423607 MS 423608 MS 423609 MS 423610 MS 423611 MS 423612 MS 423613 MS 423614 MS 423615 MS 423616 MS 423617 MS 423618 MS 423619 MD 435347 MD 435348 MD 435349 MD 435350 MD 435351 MD 435352 MD 435353 MD 435354 MD 435355 MD 435356 MD 435357 MD 435358 MD 435359 MD 435360 MD 435361 MD 435362 MD 435363 MD 435364 MD 435365 MD 435366 MD 435367 MD 435368 MD 435369 MD 435370 MD 435371 MD 435372 MD 435373 MD 435374 MD 435375 MD 435376