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 -48→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -48 2 Hydra -48 3 Hydra -48 4 Hydra -48 5 Hydra -48 6 Hydra -48 7 Hydra -48 8 Hydra -48 9 Hydra -48 10 Hydra -48 11 Hydra -48 12 Hydra -48 13 Hydra -48 14 Hydra -48 15 Hydra -48 16 Hydra -48 17 Hydra -48 18 Hydra -48 19 Hydra -48 20 Hydra -48 21 Hydra -48 22 Hydra -48 23 Hydra -48 24 Hydra -48 25 Hydra -48 26 Hydra -48 27 Hydra -48 28 Hydra -48 2 Centaurus -47 23 October 1520 24 October 1520 25 October 1520 26 October 1520 27 October 1520 28 October 1520 29 October 1520 30 October 1520 31 October 1520 1 November 1520 2 November 1520 3 November 1520 4 November 1520 5 November 1520 6 November 1520 7 November 1520 8 November 1520 9 November 1520 10 November 1520 11 November 1520 12 November 1520 13 November 1520 14 November 1520 15 November 1520 16 November 1520 17 November 1520 18 November 1520 19 November 1520 20 November 1520
MS -179449 MS -179450 MS -179451 MS -179452 MS -179453 MS -179454 MS -179455 MS -179456 MS -179457 MS -179458 MS -179459 MS -179460 MS -179461 MS -179462 MS -179463 MS -179464 MS -179465 MS -179466 MS -179467 MS -179468 MS -179469 MS -179470 MS -179471 MS -179472 MS -179473 MS -179474 MS -179475 MS -179476 MS -179422 MD -184444 MD -184443 MD -184442 MD -184441 MD -184440 MD -184439 MD -184438 MD -184437 MD -184436 MD -184435 MD -184434 MD -184433 MD -184432 MD -184431 MD -184430 MD -184429 MD -184428 MD -184427 MD -184426 MD -184425 MD -184424 MD -184423 MD -184422 MD -184421 MD -184420 MD -184419 MD -184418 MD -184417 MD -184416