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 -655→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -655 2 Hydra -655 3 Hydra -655 4 Hydra -655 5 Hydra -655 6 Hydra -655 7 Hydra -655 8 Hydra -655 9 Hydra -655 10 Hydra -655 11 Hydra -655 12 Hydra -655 13 Hydra -655 14 Hydra -655 15 Hydra -655 16 Hydra -655 17 Hydra -655 18 Hydra -655 19 Hydra -655 20 Hydra -655 21 Hydra -655 22 Hydra -655 23 Hydra -655 24 Hydra -655 25 Hydra -655 26 Hydra -655 27 Hydra -655 28 Hydra -655 2 Centaurus -654 20 October 0378 21 October 0378 22 October 0378 23 October 0378 24 October 0378 25 October 0378 26 October 0378 27 October 0378 28 October 0378 29 October 0378 30 October 0378 31 October 0378 1 November 0378 2 November 0378 3 November 0378 4 November 0378 5 November 0378 6 November 0378 7 November 0378 8 November 0378 9 November 0378 10 November 0378 11 November 0378 12 November 0378 13 November 0378 14 November 0378 15 November 0378 16 November 0378 17 November 0378
MS -585286 MS -585287 MS -585288 MS -585289 MS -585290 MS -585291 MS -585292 MS -585293 MS -585294 MS -585295 MS -585296 MS -585297 MS -585298 MS -585299 MS -585300 MS -585301 MS -585302 MS -585303 MS -585304 MS -585305 MS -585306 MS -585307 MS -585308 MS -585309 MS -585310 MS -585311 MS -585312 MS -585313 MS -585259 MD -601554 MD -601553 MD -601552 MD -601551 MD -601550 MD -601549 MD -601548 MD -601547 MD -601546 MD -601545 MD -601544 MD -601543 MD -601542 MD -601541 MD -601540 MD -601539 MD -601538 MD -601537 MD -601536 MD -601535 MD -601534 MD -601533 MD -601532 MD -601531 MD -601530 MD -601529 MD -601528 MD -601527 MD -601526