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 -722→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -722 2 Hydra -722 3 Hydra -722 4 Hydra -722 5 Hydra -722 6 Hydra -722 7 Hydra -722 8 Hydra -722 9 Hydra -722 10 Hydra -722 11 Hydra -722 12 Hydra -722 13 Hydra -722 14 Hydra -722 15 Hydra -722 16 Hydra -722 17 Hydra -722 18 Hydra -722 19 Hydra -722 20 Hydra -722 21 Hydra -722 22 Hydra -722 23 Hydra -722 24 Hydra -722 25 Hydra -722 26 Hydra -722 27 Hydra -722 28 Hydra -722 2 Centaurus -721 30 September 0252 1 October 0252 2 October 0252 3 October 0252 4 October 0252 5 October 0252 6 October 0252 7 October 0252 8 October 0252 9 October 0252 10 October 0252 11 October 0252 12 October 0252 13 October 0252 14 October 0252 15 October 0252 16 October 0252 17 October 0252 18 October 0252 19 October 0252 20 October 0252 21 October 0252 22 October 0252 23 October 0252 24 October 0252 25 October 0252 26 October 0252 27 October 0252
MS -630082 MS -630083 MS -630084 MS -630085 MS -630086 MS -630087 MS -630088 MS -630089 MS -630090 MS -630091 MS -630092 MS -630093 MS -630094 MS -630095 MS -630096 MS -630097 MS -630098 MS -630099 MS -630100 MS -630101 MS -630102 MS -630103 MS -630104 MS -630105 MS -630106 MS -630107 MS -630108 MS -630109 MS -630055 MD -647594 MD -647593 MD -647592 MD -647591 MD -647590 MD -647589 MD -647588 MD -647587 MD -647586 MD -647585 MD -647584 MD -647583 MD -647582 MD -647581 MD -647580 MD -647579 MD -647578 MD -647577 MD -647576 MD -647575 MD -647574 MD -647573 MD -647572 MD -647571 MD -647570 MD -647569 MD -647568 MD -647567