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 -233→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -233 2 Hydra -233 3 Hydra -233 4 Hydra -233 5 Hydra -233 6 Hydra -233 7 Hydra -233 8 Hydra -233 9 Hydra -233 10 Hydra -233 11 Hydra -233 12 Hydra -233 13 Hydra -233 14 Hydra -233 15 Hydra -233 16 Hydra -233 17 Hydra -233 18 Hydra -233 19 Hydra -233 20 Hydra -233 21 Hydra -233 22 Hydra -233 23 Hydra -233 24 Hydra -233 25 Hydra -233 26 Hydra -233 27 Hydra -233 28 Hydra -233 2 Centaurus -232 30 September 1172 1 October 1172 2 October 1172 3 October 1172 4 October 1172 5 October 1172 6 October 1172 7 October 1172 8 October 1172 9 October 1172 10 October 1172 11 October 1172 12 October 1172 13 October 1172 14 October 1172 15 October 1172 16 October 1172 17 October 1172 18 October 1172 19 October 1172 20 October 1172 21 October 1172 22 October 1172 23 October 1172 24 October 1172 25 October 1172 26 October 1172 27 October 1172 28 October 1172
MS -303140 MS -303141 MS -303142 MS -303143 MS -303144 MS -303145 MS -303146 MS -303147 MS -303148 MS -303149 MS -303150 MS -303151 MS -303152 MS -303153 MS -303154 MS -303155 MS -303156 MS -303157 MS -303158 MS -303159 MS -303160 MS -303161 MS -303162 MS -303163 MS -303164 MS -303165 MS -303166 MS -303167 MS -303113 MD -311571 MD -311570 MD -311569 MD -311568 MD -311567 MD -311566 MD -311565 MD -311564 MD -311563 MD -311562 MD -311561 MD -311560 MD -311559 MD -311558 MD -311557 MD -311556 MD -311555 MD -311554 MD -311553 MD -311552 MD -311551 MD -311550 MD -311549 MD -311548 MD -311547 MD -311546 MD -311545 MD -311544 MD -311543