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 -727→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -727 2 Hydra -727 3 Hydra -727 4 Hydra -727 5 Hydra -727 6 Hydra -727 7 Hydra -727 8 Hydra -727 9 Hydra -727 10 Hydra -727 11 Hydra -727 12 Hydra -727 13 Hydra -727 14 Hydra -727 15 Hydra -727 16 Hydra -727 17 Hydra -727 18 Hydra -727 19 Hydra -727 20 Hydra -727 21 Hydra -727 22 Hydra -727 23 Hydra -727 24 Hydra -727 25 Hydra -727 26 Hydra -727 27 Hydra -727 28 Hydra -727 2 Centaurus -726 5 May 0243 6 May 0243 7 May 0243 8 May 0243 9 May 0243 10 May 0243 11 May 0243 12 May 0243 13 May 0243 14 May 0243 15 May 0243 16 May 0243 17 May 0243 18 May 0243 19 May 0243 20 May 0243 21 May 0243 22 May 0243 23 May 0243 24 May 0243 25 May 0243 26 May 0243 27 May 0243 28 May 0243 29 May 0243 30 May 0243 31 May 0243 1 June 0243 2 June 0243
MS -633425 MS -633426 MS -633427 MS -633428 MS -633429 MS -633430 MS -633431 MS -633432 MS -633433 MS -633434 MS -633435 MS -633436 MS -633437 MS -633438 MS -633439 MS -633440 MS -633441 MS -633442 MS -633443 MS -633444 MS -633445 MS -633446 MS -633447 MS -633448 MS -633449 MS -633450 MS -633451 MS -633452 MS -633398 MD -651030 MD -651029 MD -651028 MD -651027 MD -651026 MD -651025 MD -651024 MD -651023 MD -651022 MD -651021 MD -651020 MD -651019 MD -651018 MD -651017 MD -651016 MD -651015 MD -651014 MD -651013 MD -651012 MD -651011 MD -651010 MD -651009 MD -651008 MD -651007 MD -651006 MD -651005 MD -651004 MD -651003 MD -651002