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 -438→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -438 2 Hydra -438 3 Hydra -438 4 Hydra -438 5 Hydra -438 6 Hydra -438 7 Hydra -438 8 Hydra -438 9 Hydra -438 10 Hydra -438 11 Hydra -438 12 Hydra -438 13 Hydra -438 14 Hydra -438 15 Hydra -438 16 Hydra -438 17 Hydra -438 18 Hydra -438 19 Hydra -438 20 Hydra -438 21 Hydra -438 22 Hydra -438 23 Hydra -438 24 Hydra -438 25 Hydra -438 26 Hydra -438 27 Hydra -438 28 Hydra -438 2 Centaurus -437 24 January 0787 25 January 0787 26 January 0787 27 January 0787 28 January 0787 29 January 0787 30 January 0787 31 January 0787 1 February 0787 2 February 0787 3 February 0787 4 February 0787 5 February 0787 6 February 0787 7 February 0787 8 February 0787 9 February 0787 10 February 0787 11 February 0787 12 February 0787 13 February 0787 14 February 0787 15 February 0787 16 February 0787 17 February 0787 18 February 0787 19 February 0787 20 February 0787 21 February 0787
MS -440201 MS -440202 MS -440203 MS -440204 MS -440205 MS -440206 MS -440207 MS -440208 MS -440209 MS -440210 MS -440211 MS -440212 MS -440213 MS -440214 MS -440215 MS -440216 MS -440217 MS -440218 MS -440219 MS -440220 MS -440221 MS -440222 MS -440223 MS -440224 MS -440225 MS -440226 MS -440227 MS -440228 MS -440174 MD -452439 MD -452438 MD -452437 MD -452436 MD -452435 MD -452434 MD -452433 MD -452432 MD -452431 MD -452430 MD -452429 MD -452428 MD -452427 MD -452426 MD -452425 MD -452424 MD -452423 MD -452422 MD -452421 MD -452420 MD -452419 MD -452418 MD -452417 MD -452416 MD -452415 MD -452414 MD -452413 MD -452412 MD -452411