Tau

Hot blue star

Its story

Tau Librae burns blue at 367 light-years, set in the scales that part summer from southern autumn. It is a young, hot star — the kind that turns spectroscopic catalogues turquoise and dies within a few hundred million years. Look south on a clear night: what you see is light that left when Galileo had yet to point his telescope at the sky.

Constellation: Libra
Apparent magnitude: 3.66
Distance: 366.9 light years
Coordinates (J2000): RA 234.664° · Dec -29.778°
Catalogue: HIP 76600 · HD 139365

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