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 -499→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -499 2 Hydra -499 3 Hydra -499 4 Hydra -499 5 Hydra -499 6 Hydra -499 7 Hydra -499 8 Hydra -499 9 Hydra -499 10 Hydra -499 11 Hydra -499 12 Hydra -499 13 Hydra -499 14 Hydra -499 15 Hydra -499 16 Hydra -499 17 Hydra -499 18 Hydra -499 19 Hydra -499 20 Hydra -499 21 Hydra -499 22 Hydra -499 23 Hydra -499 24 Hydra -499 25 Hydra -499 26 Hydra -499 27 Hydra -499 28 Hydra -499 2 Centaurus -498 19 April 0672 20 April 0672 21 April 0672 22 April 0672 23 April 0672 24 April 0672 25 April 0672 26 April 0672 27 April 0672 28 April 0672 29 April 0672 30 April 0672 1 May 0672 2 May 0672 3 May 0672 4 May 0672 5 May 0672 6 May 0672 7 May 0672 8 May 0672 9 May 0672 10 May 0672 11 May 0672 12 May 0672 13 May 0672 14 May 0672 15 May 0672 16 May 0672 17 May 0672
MS -480985 MS -480986 MS -480987 MS -480988 MS -480989 MS -480990 MS -480991 MS -480992 MS -480993 MS -480994 MS -480995 MS -480996 MS -480997 MS -480998 MS -480999 MS -481000 MS -481001 MS -481002 MS -481003 MS -481004 MS -481005 MS -481006 MS -481007 MS -481008 MS -481009 MS -481010 MS -481011 MS -481012 MS -480958 MD -494356 MD -494355 MD -494354 MD -494353 MD -494352 MD -494351 MD -494350 MD -494349 MD -494348 MD -494347 MD -494346 MD -494345 MD -494344 MD -494343 MD -494342 MD -494341 MD -494340 MD -494339 MD -494338 MD -494337 MD -494336 MD -494335 MD -494334 MD -494333 MD -494332 MD -494331 MD -494330 MD -494329 MD -494328