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 -448→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -448 2 Hydra -448 3 Hydra -448 4 Hydra -448 5 Hydra -448 6 Hydra -448 7 Hydra -448 8 Hydra -448 9 Hydra -448 10 Hydra -448 11 Hydra -448 12 Hydra -448 13 Hydra -448 14 Hydra -448 15 Hydra -448 16 Hydra -448 17 Hydra -448 18 Hydra -448 19 Hydra -448 20 Hydra -448 21 Hydra -448 22 Hydra -448 23 Hydra -448 24 Hydra -448 25 Hydra -448 26 Hydra -448 27 Hydra -448 28 Hydra -448 2 Centaurus -447 1 April 0768 2 April 0768 3 April 0768 4 April 0768 5 April 0768 6 April 0768 7 April 0768 8 April 0768 9 April 0768 10 April 0768 11 April 0768 12 April 0768 13 April 0768 14 April 0768 15 April 0768 16 April 0768 17 April 0768 18 April 0768 19 April 0768 20 April 0768 21 April 0768 22 April 0768 23 April 0768 24 April 0768 25 April 0768 26 April 0768 27 April 0768 28 April 0768 29 April 0768
MS -446887 MS -446888 MS -446889 MS -446890 MS -446891 MS -446892 MS -446893 MS -446894 MS -446895 MS -446896 MS -446897 MS -446898 MS -446899 MS -446900 MS -446901 MS -446902 MS -446903 MS -446904 MS -446905 MS -446906 MS -446907 MS -446908 MS -446909 MS -446910 MS -446911 MS -446912 MS -446913 MS -446914 MS -446860 MD -459311 MD -459310 MD -459309 MD -459308 MD -459307 MD -459306 MD -459305 MD -459304 MD -459303 MD -459302 MD -459301 MD -459300 MD -459299 MD -459298 MD -459297 MD -459296 MD -459295 MD -459294 MD -459293 MD -459292 MD -459291 MD -459290 MD -459289 MD -459288 MD -459287 MD -459286 MD -459285 MD -459284 MD -459283