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 -252→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -252 2 Hydra -252 3 Hydra -252 4 Hydra -252 5 Hydra -252 6 Hydra -252 7 Hydra -252 8 Hydra -252 9 Hydra -252 10 Hydra -252 11 Hydra -252 12 Hydra -252 13 Hydra -252 14 Hydra -252 15 Hydra -252 16 Hydra -252 17 Hydra -252 18 Hydra -252 19 Hydra -252 20 Hydra -252 21 Hydra -252 22 Hydra -252 23 Hydra -252 24 Hydra -252 25 Hydra -252 26 Hydra -252 27 Hydra -252 28 Hydra -252 2 Centaurus -251 2 January 1137 3 January 1137 4 January 1137 5 January 1137 6 January 1137 7 January 1137 8 January 1137 9 January 1137 10 January 1137 11 January 1137 12 January 1137 13 January 1137 14 January 1137 15 January 1137 16 January 1137 17 January 1137 18 January 1137 19 January 1137 20 January 1137 21 January 1137 22 January 1137 23 January 1137 24 January 1137 25 January 1137 26 January 1137 27 January 1137 28 January 1137 29 January 1137
MS -315843 MS -315844 MS -315845 MS -315846 MS -315847 MS -315848 MS -315849 MS -315850 MS -315851 MS -315852 MS -315853 MS -315854 MS -315855 MS -315856 MS -315857 MS -315858 MS -315859 MS -315860 MS -315861 MS -315862 MS -315863 MS -315864 MS -315865 MS -315866 MS -315867 MS -315868 MS -315869 MS -315870 MS -315816 MD -324626 MD -324625 MD -324624 MD -324623 MD -324622 MD -324621 MD -324620 MD -324619 MD -324618 MD -324617 MD -324616 MD -324615 MD -324614 MD -324613 MD -324612 MD -324611 MD -324610 MD -324609 MD -324608 MD -324607 MD -324606 MD -324605 MD -324604 MD -324603 MD -324602 MD -324601 MD -324600 MD -324599