Hydra: Difference between revisions

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Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees. Also one of the longest at over 100 degrees, its southern end abuts Libra and Centaurus and its northern end borders Cancer.It has a long history, having been included among the 48 constellations listed by the 2nd century astronomer Ptolemy. It is commonly represented as a water snake. It should not be confused with the similarly named constellation of Hydrus. ^[1]

Messier Objects

Hydra contains three Messier objects. Messier 83, also known as the Southern Pinwheel Galaxy, is located on the border of Hydra and Centaurus, Messier 68 is a globular cluster near Messier 83, and Messier 48 is an open star cluster in the western end of the serpent.[1] NGC 3242 is a planetary nebula of magnitude 7.5, 1400 light-years from Earth. Discovered in 1785 by William Herschel, it has earned the nickname "Ghost of Jupiter" because of its striking resemblance to the giant planet. Its blue-green disk is visible in small telescopes and its halo is visible in larger instruments. Messier 48 (NGC 2548) is an open cluster that is visible to the naked eye under dark skies. Its shape has been described as "triangular"; this 80-star cluster is unusually large, more than half a degree in diameter, larger than the diameter of the full Moon. ^[2]

HGS Session References

HGS Sessions - Clearing Dragon Moth Grid - 3/10/2015 ^[3]

References

Found in HGS Manual on Page 108 Found in HGS Manual on Page 115

[1] Hydra

[2] Hydra

[3] HGS Session

[1]

[2]

[3]

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	==Messier Objects==-		==Messier Objects==

	Hydra contains three Messier objects. [[Messier 83]], also known as the Southern Pinwheel Galaxy, is located on the border of Hydra and Centaurus, [[Messier 68]] is a globular cluster near Messier 83, and [[Messier 48]] is an open star cluster in the western end of the serpent.[1]		Hydra contains three Messier objects. [[Messier 83]], also known as the Southern Pinwheel Galaxy, is located on the border of Hydra and Centaurus, [[Messier 68]] is a globular cluster near Messier 83, and [[Messier 48]] is an open star cluster in the western end of the serpent.[1]