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Alpha Scorpii, 21 Scorpii

Truly a giant, Antares, the brightest star in the constellation of Scorpius, has an estimated diameter of 400 million kilometres.

Location of Antares

Antares lies at the heart of Scorpius, the constellation of the Scorpion. Nearby in the sky is M4, a Globular Cluster that is actually ten times farther away than its bright neighbour.

Illustration of a Red Giant

A giant among giants: With an estimated diameter of 400 million kilometres, the red star Antares is large enough to consume the solar system almost to the orbit of Mars.


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