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 -39→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -39 2 Hydra -39 3 Hydra -39 4 Hydra -39 5 Hydra -39 6 Hydra -39 7 Hydra -39 8 Hydra -39 9 Hydra -39 10 Hydra -39 11 Hydra -39 12 Hydra -39 13 Hydra -39 14 Hydra -39 15 Hydra -39 16 Hydra -39 17 Hydra -39 18 Hydra -39 19 Hydra -39 20 Hydra -39 21 Hydra -39 22 Hydra -39 23 Hydra -39 24 Hydra -39 25 Hydra -39 26 Hydra -39 27 Hydra -39 28 Hydra -39 2 Centaurus -38 28 September 1537 29 September 1537 30 September 1537 1 October 1537 2 October 1537 3 October 1537 4 October 1537 5 October 1537 6 October 1537 7 October 1537 8 October 1537 9 October 1537 10 October 1537 11 October 1537 12 October 1537 13 October 1537 14 October 1537 15 October 1537 16 October 1537 17 October 1537 18 October 1537 19 October 1537 20 October 1537 21 October 1537 22 October 1537 23 October 1537 24 October 1537 25 October 1537 26 October 1537
MS -173432 MS -173433 MS -173434 MS -173435 MS -173436 MS -173437 MS -173438 MS -173439 MS -173440 MS -173441 MS -173442 MS -173443 MS -173444 MS -173445 MS -173446 MS -173447 MS -173448 MS -173449 MS -173450 MS -173451 MS -173452 MS -173453 MS -173454 MS -173455 MS -173456 MS -173457 MS -173458 MS -173459 MS -173405 MD -178260 MD -178259 MD -178258 MD -178257 MD -178256 MD -178255 MD -178254 MD -178253 MD -178252 MD -178251 MD -178250 MD -178249 MD -178248 MD -178247 MD -178246 MD -178245 MD -178244 MD -178243 MD -178242 MD -178241 MD -178240 MD -178239 MD -178238 MD -178237 MD -178236 MD -178235 MD -178234 MD -178233 MD -178232