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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. <ref>[http://en.wikipedia.org/wiki/Hydra_%28constellation%29 Hydra]</ref> | [[File:375px-Hydra IAU.svg.png|thumb|Hydra]] | ||
[[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. <ref>[http://en.wikipedia.org/wiki/Hydra_%28constellation%29 Hydra]</ref> | |||
Despite its size, Hydra contains only one reasonably bright star, Alphard, designated Alpha Hydrae. It is an orange giant of magnitude 2.0, 177 light-years from Earth. Its traditional name means "the solitary one". Beta Hydrae is a blue-white star of magnitude 4.3, 365 light-years from Earth. Gamma Hydrae is a yellow giant of magnitude 3.0, 132 light-years from Earth. <ref>[http://en.wikipedia.org/wiki/Hydra_%28constellation%29 Hydra]</ref> | Despite its size, Hydra contains only one reasonably bright star, Alphard, designated Alpha Hydrae. It is an orange giant of magnitude 2.0, 177 light-years from Earth. Its traditional name means "the solitary one". Beta Hydrae is a blue-white star of magnitude 4.3, 365 light-years from Earth. Gamma Hydrae is a yellow giant of magnitude 3.0, 132 light-years from Earth. <ref>[http://en.wikipedia.org/wiki/Hydra_%28constellation%29 Hydra]</ref> | ||
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==Legend== | ==Legend== | ||
[[File:Sidney Hall - Urania's Mirror - Noctua, Corvus, Crater, Sextans Uraniæ, Hydra, Felis, Lupus, Centaurus, Antlia Pneumatica, Argo Navis, and Pyxis Nautica.jpg|thumb|File:Sidney Hall - Urania's Mirror - Noctua, Corvus, Crater, Sextans Uraniæ, Hydra, Felis, Lupus, Centaurus, Antlia Pneumatica, Argo Navis, and Pyxis Nautica.jpg]] | |||
The Greek constellation of [[Hydra]] is an adaptation of a Babylonian constellation: the MUL.APIN includes a "serpent" constellation (MUL.DINGIR.MUŠ) that loosely corresponds to Hydra. It is one of two Babylonian "serpent" constellations (the other being the origin of the Greek Serpens), a mythological hybrid of serpent, lion and bird. | The Greek constellation of [[Hydra]] is an adaptation of a Babylonian constellation: the MUL.APIN includes a "serpent" constellation (MUL.DINGIR.MUŠ) that loosely corresponds to Hydra. It is one of two Babylonian "serpent" constellations (the other being the origin of the Greek Serpens), a mythological hybrid of serpent, lion and bird. | ||
The shape of Hydra resembles a twisting snake, and features as such in some Greek myths. One myth associates it with a water snake that a crow served Apollo in a cup when it was sent to fetch water; Apollo saw through the fraud, and angrily cast the crow, cup, and snake, into the sky. It is also associated with the monster Hydra, with its many heads, killed by [[Hercules]], represented in another constellation. According to legend, if one of the hydra's heads was cut off, two more would grow in its place. However, Hercules burned out the roots of the heads he severed to prevent them from growing again, and thus overcame the hydra.<ref>[http://en.wikipedia.org/wiki/Hydra_%28constellation%29 Hydra]</ref> | The shape of Hydra resembles a twisting snake, and features as such in some Greek myths. One myth associates it with a water snake that a crow served Apollo in a cup when it was sent to fetch water; Apollo saw through the fraud, and angrily cast the crow, cup, and snake, into the sky. It is also associated with the monster Hydra, with its many heads, killed by [[Hercules]], represented in another constellation. According to legend, if one of the hydra's heads was cut off, two more would grow in its place. However, Hercules burned out the roots of the heads he severed to prevent them from growing again, and thus overcame the hydra.<ref>[http://en.wikipedia.org/wiki/Hydra_%28constellation%29 Hydra]</ref> | ||
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HGS Sessions - Clearing [[Dragon Moth Grid]] - 3/10/2015 <ref>[http://www.energeticsynthesis.com/index.php/forum/52-hgs-discussions-and-q-a-a/60650-hgs-shared-sessions-and-discussion?start=138#100919 HGS Session]</ref> | HGS Sessions - Clearing [[Dragon Moth Grid]] - 3/10/2015 <ref>[http://www.energeticsynthesis.com/index.php/forum/52-hgs-discussions-and-q-a-a/60650-hgs-shared-sessions-and-discussion?start=138#100919 HGS Session]</ref> | ||
HGS Sessions - Clearing [[Dorado, Leo Minor, Musca, Perseus constellations]] - 3/23/2015 <ref> HGS Session</ref> | |||
==References== | ==References== | ||