![]() This time, astronomers analyzed the polarization of light emitted by Vega and detected a weak magnetic field at its surface. ![]() Vega is also surrounded by a disk of dust, in which the inhomogeneities suggest the presence of planets. The intense centrifugal force induced by this rapid rotation flattens its poles and generates temperature variations of more than 1000 degrees Celsius between the polar (warmer) and the equatorial regions of its surface. ![]() Vega rotates in less than a day, while the Sun's rotation period is 27 days. Because it is both bright and nearby, Vega has been often studied but it is still revealing new aspects when it is observed with more powerful instruments. Vega is twice as massive as the Sun and has only one tenth its age. It has been used as a reference star for brightness comparisons. Located at only 25 light years from Earth in the Lyra constellation, it is the fifth brightest star in the sky. Vega is a famous star among amateur and professional astronomers.
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