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 -450→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -450 2 Hydra -450 3 Hydra -450 4 Hydra -450 5 Hydra -450 6 Hydra -450 7 Hydra -450 8 Hydra -450 9 Hydra -450 10 Hydra -450 11 Hydra -450 12 Hydra -450 13 Hydra -450 14 Hydra -450 15 Hydra -450 16 Hydra -450 17 Hydra -450 18 Hydra -450 19 Hydra -450 20 Hydra -450 21 Hydra -450 22 Hydra -450 23 Hydra -450 24 Hydra -450 25 Hydra -450 26 Hydra -450 27 Hydra -450 28 Hydra -450 2 Centaurus -449 27 June 0764 28 June 0764 29 June 0764 30 June 0764 1 July 0764 2 July 0764 3 July 0764 4 July 0764 5 July 0764 6 July 0764 7 July 0764 8 July 0764 9 July 0764 10 July 0764 11 July 0764 12 July 0764 13 July 0764 14 July 0764 15 July 0764 16 July 0764 17 July 0764 18 July 0764 19 July 0764 20 July 0764 21 July 0764 22 July 0764 23 July 0764 24 July 0764 25 July 0764
MS -448224 MS -448225 MS -448226 MS -448227 MS -448228 MS -448229 MS -448230 MS -448231 MS -448232 MS -448233 MS -448234 MS -448235 MS -448236 MS -448237 MS -448238 MS -448239 MS -448240 MS -448241 MS -448242 MS -448243 MS -448244 MS -448245 MS -448246 MS -448247 MS -448248 MS -448249 MS -448250 MS -448251 MS -448197 MD -460685 MD -460684 MD -460683 MD -460682 MD -460681 MD -460680 MD -460679 MD -460678 MD -460677 MD -460676 MD -460675 MD -460674 MD -460673 MD -460672 MD -460671 MD -460670 MD -460669 MD -460668 MD -460667 MD -460666 MD -460665 MD -460664 MD -460663 MD -460662 MD -460661 MD -460660 MD -460659 MD -460658 MD -460657