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 -669→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -669 2 Hydra -669 3 Hydra -669 4 Hydra -669 5 Hydra -669 6 Hydra -669 7 Hydra -669 8 Hydra -669 9 Hydra -669 10 Hydra -669 11 Hydra -669 12 Hydra -669 13 Hydra -669 14 Hydra -669 15 Hydra -669 16 Hydra -669 17 Hydra -669 18 Hydra -669 19 Hydra -669 20 Hydra -669 21 Hydra -669 22 Hydra -669 23 Hydra -669 24 Hydra -669 25 Hydra -669 26 Hydra -669 27 Hydra -669 28 Hydra -669 2 Centaurus -668 18 June 0352 19 June 0352 20 June 0352 21 June 0352 22 June 0352 23 June 0352 24 June 0352 25 June 0352 26 June 0352 27 June 0352 28 June 0352 29 June 0352 30 June 0352 1 July 0352 2 July 0352 3 July 0352 4 July 0352 5 July 0352 6 July 0352 7 July 0352 8 July 0352 9 July 0352 10 July 0352 11 July 0352 12 July 0352 13 July 0352 14 July 0352 15 July 0352 16 July 0352
MS -594646 MS -594647 MS -594648 MS -594649 MS -594650 MS -594651 MS -594652 MS -594653 MS -594654 MS -594655 MS -594656 MS -594657 MS -594658 MS -594659 MS -594660 MS -594661 MS -594662 MS -594663 MS -594664 MS -594665 MS -594666 MS -594667 MS -594668 MS -594669 MS -594670 MS -594671 MS -594672 MS -594673 MS -594619 MD -611174 MD -611173 MD -611172 MD -611171 MD -611170 MD -611169 MD -611168 MD -611167 MD -611166 MD -611165 MD -611164 MD -611163 MD -611162 MD -611161 MD -611160 MD -611159 MD -611158 MD -611157 MD -611156 MD -611155 MD -611154 MD -611153 MD -611152 MD -611151 MD -611150 MD -611149 MD -611148 MD -611147 MD -611146