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 300 2 Hydra 300 3 Hydra 300 4 Hydra 300 5 Hydra 300 6 Hydra 300 7 Hydra 300 8 Hydra 300 9 Hydra 300 10 Hydra 300 11 Hydra 300 12 Hydra 300 13 Hydra 300 14 Hydra 300 15 Hydra 300 16 Hydra 300 17 Hydra 300 18 Hydra 300 19 Hydra 300 20 Hydra 300 21 Hydra 300 22 Hydra 300 23 Hydra 300 24 Hydra 300 25 Hydra 300 26 Hydra 300 27 Hydra 300 28 Hydra 300 1 Corvus 300 15 June 2175 16 June 2175 17 June 2175 18 June 2175 19 June 2175 20 June 2175 21 June 2175 22 June 2175 23 June 2175 24 June 2175 25 June 2175 26 June 2175 27 June 2175 28 June 2175 29 June 2175 30 June 2175 1 July 2175 2 July 2175 3 July 2175 4 July 2175 5 July 2175 6 July 2175 7 July 2175 8 July 2175 9 July 2175 10 July 2175 11 July 2175 12 July 2175 13 July 2175
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