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 -429→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -429 2 Hydra -429 3 Hydra -429 4 Hydra -429 5 Hydra -429 6 Hydra -429 7 Hydra -429 8 Hydra -429 9 Hydra -429 10 Hydra -429 11 Hydra -429 12 Hydra -429 13 Hydra -429 14 Hydra -429 15 Hydra -429 16 Hydra -429 17 Hydra -429 18 Hydra -429 19 Hydra -429 20 Hydra -429 21 Hydra -429 22 Hydra -429 23 Hydra -429 24 Hydra -429 25 Hydra -429 26 Hydra -429 27 Hydra -429 28 Hydra -429 2 Centaurus -428 30 December 0803 31 December 0803 1 January 0804 2 January 0804 3 January 0804 4 January 0804 5 January 0804 6 January 0804 7 January 0804 8 January 0804 9 January 0804 10 January 0804 11 January 0804 12 January 0804 13 January 0804 14 January 0804 15 January 0804 16 January 0804 17 January 0804 18 January 0804 19 January 0804 20 January 0804 21 January 0804 22 January 0804 23 January 0804 24 January 0804 25 January 0804 26 January 0804 27 January 0804
MS -434184 MS -434185 MS -434186 MS -434187 MS -434188 MS -434189 MS -434190 MS -434191 MS -434192 MS -434193 MS -434194 MS -434195 MS -434196 MS -434197 MS -434198 MS -434199 MS -434200 MS -434201 MS -434202 MS -434203 MS -434204 MS -434205 MS -434206 MS -434207 MS -434208 MS -434209 MS -434210 MS -434211 MS -434157 MD -446255 MD -446254 MD -446253 MD -446252 MD -446251 MD -446250 MD -446249 MD -446248 MD -446247 MD -446246 MD -446245 MD -446244 MD -446243 MD -446242 MD -446241 MD -446240 MD -446239 MD -446238 MD -446237 MD -446236 MD -446235 MD -446234 MD -446233 MD -446232 MD -446231 MD -446230 MD -446229 MD -446228 MD -446227