Text written in Basque and translated automatically by Elia without any subsequent editing. SEE ORIGINAL
Events Polar Star
2004/07/01 Elhuyar Zientzia Iturria: Elhuyar aldizkaria
The brightness of the polar star is because the star evolves.
The brightness of the Polar star is undergoing changes lately. Every four days it makes a pulse, but currently the pulses are barely noticeable, and in the last two thousand years they shine 150% more.
These changes are due to the evolution of the star. The proportions of hydrogen and helium are changing, causing a change of brightness.
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