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 37→
SolPhoDeiTerVenJovSat
1
2345678
9101112131415
16171819202122
232425262728
1 Hydra 37 2 Hydra 37 3 Hydra 37 4 Hydra 37 5 Hydra 37 6 Hydra 37 7 Hydra 37 8 Hydra 37 9 Hydra 37 10 Hydra 37 11 Hydra 37 12 Hydra 37 13 Hydra 37 14 Hydra 37 15 Hydra 37 16 Hydra 37 17 Hydra 37 18 Hydra 37 19 Hydra 37 20 Hydra 37 21 Hydra 37 22 Hydra 37 23 Hydra 37 24 Hydra 37 25 Hydra 37 26 Hydra 37 27 Hydra 37 28 Hydra 37 1 Corvus 37 23 August 1680 24 August 1680 25 August 1680 26 August 1680 27 August 1680 28 August 1680 29 August 1680 30 August 1680 31 August 1680 1 September 1680 2 September 1680 3 September 1680 4 September 1680 5 September 1680 6 September 1680 7 September 1680 8 September 1680 9 September 1680 10 September 1680 11 September 1680 12 September 1680 13 September 1680 14 September 1680 15 September 1680 16 September 1680 17 September 1680 18 September 1680 19 September 1680 20 September 1680 21 September 1680
MS -122648 MS -122647 MS -122646 MS -122645 MS -122644 MS -122643 MS -122642 MS -122641 MS -122640 MS -122639 MS -122638 MS -122637 MS -122636 MS -122635 MS -122634 MS -122633 MS -122632 MS -122631 MS -122630 MS -122629 MS -122628 MS -122627 MS -122626 MS -122625 MS -122624 MS -122623 MS -122622 MS -122621 MS -122620 MD -126065 MD -126064 MD -126063 MD -126062 MD -126061 MD -126060 MD -126059 MD -126058 MD -126057 MD -126056 MD -126055 MD -126054 MD -126053 MD -126052 MD -126051 MD -126050 MD -126049 MD -126048 MD -126047 MD -126046 MD -126045 MD -126044 MD -126043 MD -126042 MD -126041 MD -126040 MD -126039 MD -126038 MD -126037 MD -126036