Leo

Constellation

A zodiac constellation resembling a crouching lion, with a curved 'sickle' of stars marking its head and mane.

Facts

TypeConstellation
Area of sky947 sq°
Brightest starRegulus
Brightest star magnitudemag 1.35
HemisphereNorthern
Zodiac constellationYes
Discovered150

Leo in context

A constellation is a pattern drawn on the sky rather than a physical grouping: its stars are usually unrelated and sit at wildly different distances, just lined up as seen from Earth.

Leo covers 947 square degrees of sky, which is 2.3 percent of the whole celestial sphere.

That makes it the 12th largest of the 88 constellations the International Astronomical Union recognises.

It sits in the northern sky, and it is one of the twelve constellations the Sun passes through over a year.

Its brightest star reaches magnitude 1.35, bright enough to pick out with the naked eye under a dark sky.

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