Leo - 1

Leo is a Zodiacal constellation otherwise known as the Lion. It is one of the 48 Greek constellations originally described by the 2nd century astronomer Claudius Ptolemy (Wikipedia). Leo remains one of the 88 modern constellations defined by the International Astronomical Union (Wikipedia).

Leo (abbrev. = Leo; genitive = Leonis) covers 947 square degrees or 2.30% of the celestial sphere making it the 12th largest constellation. It contains 123 stars brighter than apparent magnitude 6.5, the brightest star being Regulus (Alpha Leonis). See the Leo Star Chart for a figure illustrating this constellation including the identification of its brighter stars.

The bright redish star in the image above (to the lower left) is the planet Mars. For another image of the 2012 conjunction of Mars in Leo, see Leo and Mars.

For more information see the entries for Leo at Wikipedia and U. Wisconsin. For a chart of Leo, see Leo (IAU).

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