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 -774→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -774 2 Hydra -774 3 Hydra -774 4 Hydra -774 5 Hydra -774 6 Hydra -774 7 Hydra -774 8 Hydra -774 9 Hydra -774 10 Hydra -774 11 Hydra -774 12 Hydra -774 13 Hydra -774 14 Hydra -774 15 Hydra -774 16 Hydra -774 17 Hydra -774 18 Hydra -774 19 Hydra -774 20 Hydra -774 21 Hydra -774 22 Hydra -774 23 Hydra -774 24 Hydra -774 25 Hydra -774 26 Hydra -774 27 Hydra -774 28 Hydra -774 2 Centaurus -773 1 December 0154 2 December 0154 3 December 0154 4 December 0154 5 December 0154 6 December 0154 7 December 0154 8 December 0154 9 December 0154 10 December 0154 11 December 0154 12 December 0154 13 December 0154 14 December 0154 15 December 0154 16 December 0154 17 December 0154 18 December 0154 19 December 0154 20 December 0154 21 December 0154 22 December 0154 23 December 0154 24 December 0154 25 December 0154 26 December 0154 27 December 0154 28 December 0154 29 December 0154
MS -664848 MS -664849 MS -664850 MS -664851 MS -664852 MS -664853 MS -664854 MS -664855 MS -664856 MS -664857 MS -664858 MS -664859 MS -664860 MS -664861 MS -664862 MS -664863 MS -664864 MS -664865 MS -664866 MS -664867 MS -664868 MS -664869 MS -664870 MS -664871 MS -664872 MS -664873 MS -664874 MS -664875 MS -664821 MD -683326 MD -683325 MD -683324 MD -683323 MD -683322 MD -683321 MD -683320 MD -683319 MD -683318 MD -683317 MD -683316 MD -683315 MD -683314 MD -683313 MD -683312 MD -683311 MD -683310 MD -683309 MD -683308 MD -683307 MD -683306 MD -683305 MD -683304 MD -683303 MD -683302 MD -683301 MD -683300 MD -683299 MD -683298