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 -622→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -622 2 Hydra -622 3 Hydra -622 4 Hydra -622 5 Hydra -622 6 Hydra -622 7 Hydra -622 8 Hydra -622 9 Hydra -622 10 Hydra -622 11 Hydra -622 12 Hydra -622 13 Hydra -622 14 Hydra -622 15 Hydra -622 16 Hydra -622 17 Hydra -622 18 Hydra -622 19 Hydra -622 20 Hydra -622 21 Hydra -622 22 Hydra -622 23 Hydra -622 24 Hydra -622 25 Hydra -622 26 Hydra -622 27 Hydra -622 28 Hydra -622 2 Centaurus -621 20 November 0440 21 November 0440 22 November 0440 23 November 0440 24 November 0440 25 November 0440 26 November 0440 27 November 0440 28 November 0440 29 November 0440 30 November 0440 1 December 0440 2 December 0440 3 December 0440 4 December 0440 5 December 0440 6 December 0440 7 December 0440 8 December 0440 9 December 0440 10 December 0440 11 December 0440 12 December 0440 13 December 0440 14 December 0440 15 December 0440 16 December 0440 17 December 0440 18 December 0440
MS -563222 MS -563223 MS -563224 MS -563225 MS -563226 MS -563227 MS -563228 MS -563229 MS -563230 MS -563231 MS -563232 MS -563233 MS -563234 MS -563235 MS -563236 MS -563237 MS -563238 MS -563239 MS -563240 MS -563241 MS -563242 MS -563243 MS -563244 MS -563245 MS -563246 MS -563247 MS -563248 MS -563249 MS -563195 MD -578877 MD -578876 MD -578875 MD -578874 MD -578873 MD -578872 MD -578871 MD -578870 MD -578869 MD -578868 MD -578867 MD -578866 MD -578865 MD -578864 MD -578863 MD -578862 MD -578861 MD -578860 MD -578859 MD -578858 MD -578857 MD -578856 MD -578855 MD -578854 MD -578853 MD -578852 MD -578851 MD -578850 MD -578849