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 -508→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -508 2 Hydra -508 3 Hydra -508 4 Hydra -508 5 Hydra -508 6 Hydra -508 7 Hydra -508 8 Hydra -508 9 Hydra -508 10 Hydra -508 11 Hydra -508 12 Hydra -508 13 Hydra -508 14 Hydra -508 15 Hydra -508 16 Hydra -508 17 Hydra -508 18 Hydra -508 19 Hydra -508 20 Hydra -508 21 Hydra -508 22 Hydra -508 23 Hydra -508 24 Hydra -508 25 Hydra -508 26 Hydra -508 27 Hydra -508 28 Hydra -508 2 Centaurus -507 15 May 0655 16 May 0655 17 May 0655 18 May 0655 19 May 0655 20 May 0655 21 May 0655 22 May 0655 23 May 0655 24 May 0655 25 May 0655 26 May 0655 27 May 0655 28 May 0655 29 May 0655 30 May 0655 31 May 0655 1 June 0655 2 June 0655 3 June 0655 4 June 0655 5 June 0655 6 June 0655 7 June 0655 8 June 0655 9 June 0655 10 June 0655 11 June 0655 12 June 0655
MS -487002 MS -487003 MS -487004 MS -487005 MS -487006 MS -487007 MS -487008 MS -487009 MS -487010 MS -487011 MS -487012 MS -487013 MS -487014 MS -487015 MS -487016 MS -487017 MS -487018 MS -487019 MS -487020 MS -487021 MS -487022 MS -487023 MS -487024 MS -487025 MS -487026 MS -487027 MS -487028 MS -487029 MS -486975 MD -500540 MD -500539 MD -500538 MD -500537 MD -500536 MD -500535 MD -500534 MD -500533 MD -500532 MD -500531 MD -500530 MD -500529 MD -500528 MD -500527 MD -500526 MD -500525 MD -500524 MD -500523 MD -500522 MD -500521 MD -500520 MD -500519 MD -500518 MD -500517 MD -500516 MD -500515 MD -500514 MD -500513 MD -500512