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 -271→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -271 2 Hydra -271 3 Hydra -271 4 Hydra -271 5 Hydra -271 6 Hydra -271 7 Hydra -271 8 Hydra -271 9 Hydra -271 10 Hydra -271 11 Hydra -271 12 Hydra -271 13 Hydra -271 14 Hydra -271 15 Hydra -271 16 Hydra -271 17 Hydra -271 18 Hydra -271 19 Hydra -271 20 Hydra -271 21 Hydra -271 22 Hydra -271 23 Hydra -271 24 Hydra -271 25 Hydra -271 26 Hydra -271 27 Hydra -271 28 Hydra -271 3 Centaurus -270 4 April 1101 5 April 1101 6 April 1101 7 April 1101 8 April 1101 9 April 1101 10 April 1101 11 April 1101 12 April 1101 13 April 1101 14 April 1101 15 April 1101 16 April 1101 17 April 1101 18 April 1101 19 April 1101 20 April 1101 21 April 1101 22 April 1101 23 April 1101 24 April 1101 25 April 1101 26 April 1101 27 April 1101 28 April 1101 29 April 1101 30 April 1101 1 May 1101
MS -328547 MS -328548 MS -328549 MS -328550 MS -328551 MS -328552 MS -328553 MS -328554 MS -328555 MS -328556 MS -328557 MS -328558 MS -328559 MS -328560 MS -328561 MS -328562 MS -328563 MS -328564 MS -328565 MS -328566 MS -328567 MS -328568 MS -328569 MS -328570 MS -328571 MS -328572 MS -328573 MS -328574 MS -328520 MD -337683 MD -337682 MD -337681 MD -337680 MD -337679 MD -337678 MD -337677 MD -337676 MD -337675 MD -337674 MD -337673 MD -337672 MD -337671 MD -337670 MD -337669 MD -337668 MD -337667 MD -337666 MD -337665 MD -337664 MD -337663 MD -337662 MD -337661 MD -337660 MD -337659 MD -337658 MD -337657 MD -337656