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 -791→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -791 2 Hydra -791 3 Hydra -791 4 Hydra -791 5 Hydra -791 6 Hydra -791 7 Hydra -791 8 Hydra -791 9 Hydra -791 10 Hydra -791 11 Hydra -791 12 Hydra -791 13 Hydra -791 14 Hydra -791 15 Hydra -791 16 Hydra -791 17 Hydra -791 18 Hydra -791 19 Hydra -791 20 Hydra -791 21 Hydra -791 22 Hydra -791 23 Hydra -791 24 Hydra -791 25 Hydra -791 26 Hydra -791 27 Hydra -791 28 Hydra -791 3 Centaurus -790 6 December 0122 7 December 0122 8 December 0122 9 December 0122 10 December 0122 11 December 0122 12 December 0122 13 December 0122 14 December 0122 15 December 0122 16 December 0122 17 December 0122 18 December 0122 19 December 0122 20 December 0122 21 December 0122 22 December 0122 23 December 0122 24 December 0122 25 December 0122 26 December 0122 27 December 0122 28 December 0122 29 December 0122 30 December 0122 31 December 0122 1 January 0123 2 January 0123 3 January 0123
MS -676215 MS -676216 MS -676217 MS -676218 MS -676219 MS -676220 MS -676221 MS -676222 MS -676223 MS -676224 MS -676225 MS -676226 MS -676227 MS -676228 MS -676229 MS -676230 MS -676231 MS -676232 MS -676233 MS -676234 MS -676235 MS -676236 MS -676237 MS -676238 MS -676239 MS -676240 MS -676241 MS -676242 MS -676188 MD -695009 MD -695008 MD -695007 MD -695006 MD -695005 MD -695004 MD -695003 MD -695002 MD -695001 MD -695000 MD -694999 MD -694998 MD -694997 MD -694996 MD -694995 MD -694994 MD -694993 MD -694992 MD -694991 MD -694990 MD -694989 MD -694988 MD -694987 MD -694986 MD -694985 MD -694984 MD -694983 MD -694982 MD -694981