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 -234→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -234 2 Hydra -234 3 Hydra -234 4 Hydra -234 5 Hydra -234 6 Hydra -234 7 Hydra -234 8 Hydra -234 9 Hydra -234 10 Hydra -234 11 Hydra -234 12 Hydra -234 13 Hydra -234 14 Hydra -234 15 Hydra -234 16 Hydra -234 17 Hydra -234 18 Hydra -234 19 Hydra -234 20 Hydra -234 21 Hydra -234 22 Hydra -234 23 Hydra -234 24 Hydra -234 25 Hydra -234 26 Hydra -234 27 Hydra -234 28 Hydra -234 2 Centaurus -233 14 November 1170 15 November 1170 16 November 1170 17 November 1170 18 November 1170 19 November 1170 20 November 1170 21 November 1170 22 November 1170 23 November 1170 24 November 1170 25 November 1170 26 November 1170 27 November 1170 28 November 1170 29 November 1170 30 November 1170 1 December 1170 2 December 1170 3 December 1170 4 December 1170 5 December 1170 6 December 1170 7 December 1170 8 December 1170 9 December 1170 10 December 1170 11 December 1170 12 December 1170
MS -303808 MS -303809 MS -303810 MS -303811 MS -303812 MS -303813 MS -303814 MS -303815 MS -303816 MS -303817 MS -303818 MS -303819 MS -303820 MS -303821 MS -303822 MS -303823 MS -303824 MS -303825 MS -303826 MS -303827 MS -303828 MS -303829 MS -303830 MS -303831 MS -303832 MS -303833 MS -303834 MS -303835 MS -303781 MD -312257 MD -312256 MD -312255 MD -312254 MD -312253 MD -312252 MD -312251 MD -312250 MD -312249 MD -312248 MD -312247 MD -312246 MD -312245 MD -312244 MD -312243 MD -312242 MD -312241 MD -312240 MD -312239 MD -312238 MD -312237 MD -312236 MD -312235 MD -312234 MD -312233 MD -312232 MD -312231 MD -312230 MD -312229