The Canes Venatici reference article from the English Wikipedia on 24-Jul-2004
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Canes Venatici

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Canes Venatici
Image:Canes venatici constellation map small.png
larger map
Abbreviation CVn
Genitive Canum Venaticorum
Meaning in English the Hunting Dogs
Right ascension 13 h
Declination 40°
Visible to latitude Between 90° and −40°
Best visible May
Area
 - Total
Ranked 38th
465 sq. deg.
Number of stars with
apparent magnitude < 3
1
Brightest star
 - Apparent magnitude
Cor Caroli
2.90
Meteor showers
Bordering constellations
Canes Venatici (the hunting dogs) is a small northern constellation that was introduced by Johannes Hevelius in the 17th century. It is supposed to represent the dogs Chara and Asterion held on a leash by Boötes.

Among the objects in Canes Venatici is the Whirlpool Galaxy, M51, a spiral galaxy that is seen face on. This was the first galaxy recognised as having a spiral structure, this structure being first observed by Lord Rosse in 1845.

M51, known as the Whirlpool Galaxy. At the top of the picture is a companion galaxy which is being disrupted by the gravitational forces of M51Enlarge

M51, known as the Whirlpool Galaxy. At the top of the picture is a companion galaxy which is being disrupted by the gravitational forces of M51