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 -780→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -780 2 Hydra -780 3 Hydra -780 4 Hydra -780 5 Hydra -780 6 Hydra -780 7 Hydra -780 8 Hydra -780 9 Hydra -780 10 Hydra -780 11 Hydra -780 12 Hydra -780 13 Hydra -780 14 Hydra -780 15 Hydra -780 16 Hydra -780 17 Hydra -780 18 Hydra -780 19 Hydra -780 20 Hydra -780 21 Hydra -780 22 Hydra -780 23 Hydra -780 24 Hydra -780 25 Hydra -780 26 Hydra -780 27 Hydra -780 28 Hydra -780 3 Centaurus -779 18 August 0143 19 August 0143 20 August 0143 21 August 0143 22 August 0143 23 August 0143 24 August 0143 25 August 0143 26 August 0143 27 August 0143 28 August 0143 29 August 0143 30 August 0143 31 August 0143 1 September 0143 2 September 0143 3 September 0143 4 September 0143 5 September 0143 6 September 0143 7 September 0143 8 September 0143 9 September 0143 10 September 0143 11 September 0143 12 September 0143 13 September 0143 14 September 0143
MS -668860 MS -668861 MS -668862 MS -668863 MS -668864 MS -668865 MS -668866 MS -668867 MS -668868 MS -668869 MS -668870 MS -668871 MS -668872 MS -668873 MS -668874 MS -668875 MS -668876 MS -668877 MS -668878 MS -668879 MS -668880 MS -668881 MS -668882 MS -668883 MS -668884 MS -668885 MS -668886 MS -668887 MS -668833 MD -687449 MD -687448 MD -687447 MD -687446 MD -687445 MD -687444 MD -687443 MD -687442 MD -687441 MD -687440 MD -687439 MD -687438 MD -687437 MD -687436 MD -687435 MD -687434 MD -687433 MD -687432 MD -687431 MD -687430 MD -687429 MD -687428 MD -687427 MD -687426 MD -687425 MD -687424 MD -687423 MD -687422