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 -551→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -551 2 Hydra -551 3 Hydra -551 4 Hydra -551 5 Hydra -551 6 Hydra -551 7 Hydra -551 8 Hydra -551 9 Hydra -551 10 Hydra -551 11 Hydra -551 12 Hydra -551 13 Hydra -551 14 Hydra -551 15 Hydra -551 16 Hydra -551 17 Hydra -551 18 Hydra -551 19 Hydra -551 20 Hydra -551 21 Hydra -551 22 Hydra -551 23 Hydra -551 24 Hydra -551 25 Hydra -551 26 Hydra -551 27 Hydra -551 28 Hydra -551 3 Centaurus -550 19 June 0574 20 June 0574 21 June 0574 22 June 0574 23 June 0574 24 June 0574 25 June 0574 26 June 0574 27 June 0574 28 June 0574 29 June 0574 30 June 0574 1 July 0574 2 July 0574 3 July 0574 4 July 0574 5 July 0574 6 July 0574 7 July 0574 8 July 0574 9 July 0574 10 July 0574 11 July 0574 12 July 0574 13 July 0574 14 July 0574 15 July 0574 16 July 0574
MS -515753 MS -515754 MS -515755 MS -515756 MS -515757 MS -515758 MS -515759 MS -515760 MS -515761 MS -515762 MS -515763 MS -515764 MS -515765 MS -515766 MS -515767 MS -515768 MS -515769 MS -515770 MS -515771 MS -515772 MS -515773 MS -515774 MS -515775 MS -515776 MS -515777 MS -515778 MS -515779 MS -515780 MS -515726 MD -530089 MD -530088 MD -530087 MD -530086 MD -530085 MD -530084 MD -530083 MD -530082 MD -530081 MD -530080 MD -530079 MD -530078 MD -530077 MD -530076 MD -530075 MD -530074 MD -530073 MD -530072 MD -530071 MD -530070 MD -530069 MD -530068 MD -530067 MD -530066 MD -530065 MD -530064 MD -530063 MD -530062