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.
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1 Hydra 840 2 Hydra 840 3 Hydra 840 4 Hydra 840 5 Hydra 840 6 Hydra 840 7 Hydra 840 8 Hydra 840 9 Hydra 840 10 Hydra 840 11 Hydra 840 12 Hydra 840 13 Hydra 840 14 Hydra 840 15 Hydra 840 16 Hydra 840 17 Hydra 840 18 Hydra 840 19 Hydra 840 20 Hydra 840 21 Hydra 840 22 Hydra 840 23 Hydra 840 24 Hydra 840 25 Hydra 840 26 Hydra 840 27 Hydra 840 28 Hydra 840 1 Corvus 840 26 May 3191 27 May 3191 28 May 3191 29 May 3191 30 May 3191 31 May 3191 1 June 3191 2 June 3191 3 June 3191 4 June 3191 5 June 3191 6 June 3191 7 June 3191 8 June 3191 9 June 3191 10 June 3191 11 June 3191 12 June 3191 13 June 3191 14 June 3191 15 June 3191 16 June 3191 17 June 3191 18 June 3191 19 June 3191 20 June 3191 21 June 3191 22 June 3191 23 June 3191 24 June 3191
MS 414230 MS 414231 MS 414232 MS 414233 MS 414234 MS 414235 MS 414236 MS 414237 MS 414238 MS 414239 MS 414240 MS 414241 MS 414242 MS 414243 MS 414244 MS 414245 MS 414246 MS 414247 MS 414248 MS 414249 MS 414250 MS 414251 MS 414252 MS 414253 MS 414254 MS 414255 MS 414256 MS 414257 MS 414258 MD 425726 MD 425727 MD 425728 MD 425729 MD 425730 MD 425731 MD 425732 MD 425733 MD 425734 MD 425735 MD 425736 MD 425737 MD 425738 MD 425739 MD 425740 MD 425741 MD 425742 MD 425743 MD 425744 MD 425745 MD 425746 MD 425747 MD 425748 MD 425749 MD 425750 MD 425751 MD 425752 MD 425753 MD 425754 MD 425755