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 -10→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -10 2 Hydra -10 3 Hydra -10 4 Hydra -10 5 Hydra -10 6 Hydra -10 7 Hydra -10 8 Hydra -10 9 Hydra -10 10 Hydra -10 11 Hydra -10 12 Hydra -10 13 Hydra -10 14 Hydra -10 15 Hydra -10 16 Hydra -10 17 Hydra -10 18 Hydra -10 19 Hydra -10 20 Hydra -10 21 Hydra -10 22 Hydra -10 23 Hydra -10 24 Hydra -10 25 Hydra -10 26 Hydra -10 27 Hydra -10 28 Hydra -10 3 Centaurus -9 20 April 1592 21 April 1592 22 April 1592 23 April 1592 24 April 1592 25 April 1592 26 April 1592 27 April 1592 28 April 1592 29 April 1592 30 April 1592 1 May 1592 2 May 1592 3 May 1592 4 May 1592 5 May 1592 6 May 1592 7 May 1592 8 May 1592 9 May 1592 10 May 1592 11 May 1592 12 May 1592 13 May 1592 14 May 1592 15 May 1592 16 May 1592 17 May 1592 18 May 1592
MS -154043 MS -154044 MS -154045 MS -154046 MS -154047 MS -154048 MS -154049 MS -154050 MS -154051 MS -154052 MS -154053 MS -154054 MS -154055 MS -154056 MS -154057 MS -154058 MS -154059 MS -154060 MS -154061 MS -154062 MS -154063 MS -154064 MS -154065 MS -154066 MS -154067 MS -154068 MS -154069 MS -154070 MS -154016 MD -158332 MD -158331 MD -158330 MD -158329 MD -158328 MD -158327 MD -158326 MD -158325 MD -158324 MD -158323 MD -158322 MD -158321 MD -158320 MD -158319 MD -158318 MD -158317 MD -158316 MD -158315 MD -158314 MD -158313 MD -158312 MD -158311 MD -158310 MD -158309 MD -158308 MD -158307 MD -158306 MD -158305 MD -158304