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 -82→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -82 2 Hydra -82 3 Hydra -82 4 Hydra -82 5 Hydra -82 6 Hydra -82 7 Hydra -82 8 Hydra -82 9 Hydra -82 10 Hydra -82 11 Hydra -82 12 Hydra -82 13 Hydra -82 14 Hydra -82 15 Hydra -82 16 Hydra -82 17 Hydra -82 18 Hydra -82 19 Hydra -82 20 Hydra -82 21 Hydra -82 22 Hydra -82 23 Hydra -82 24 Hydra -82 25 Hydra -82 26 Hydra -82 27 Hydra -82 28 Hydra -82 2 Centaurus -81 3 November 1456 4 November 1456 5 November 1456 6 November 1456 7 November 1456 8 November 1456 9 November 1456 10 November 1456 11 November 1456 12 November 1456 13 November 1456 14 November 1456 15 November 1456 16 November 1456 17 November 1456 18 November 1456 19 November 1456 20 November 1456 21 November 1456 22 November 1456 23 November 1456 24 November 1456 25 November 1456 26 November 1456 27 November 1456 28 November 1456 29 November 1456 30 November 1456 1 December 1456
MS -202182 MS -202183 MS -202184 MS -202185 MS -202186 MS -202187 MS -202188 MS -202189 MS -202190 MS -202191 MS -202192 MS -202193 MS -202194 MS -202195 MS -202196 MS -202197 MS -202198 MS -202199 MS -202200 MS -202201 MS -202202 MS -202203 MS -202204 MS -202205 MS -202206 MS -202207 MS -202208 MS -202209 MS -202155 MD -207808 MD -207807 MD -207806 MD -207805 MD -207804 MD -207803 MD -207802 MD -207801 MD -207800 MD -207799 MD -207798 MD -207797 MD -207796 MD -207795 MD -207794 MD -207793 MD -207792 MD -207791 MD -207790 MD -207789 MD -207788 MD -207787 MD -207786 MD -207785 MD -207784 MD -207783 MD -207782 MD -207781 MD -207780