About This Lesson
As the Earth rotates on its axix the stars seem to rotate about the north pole star (Polaris). This rotation takes one sidereal day. Some constellations, such as the Plough, are always above the horizon and these are called .
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As the Earth rotates on its axix the stars seem to rotate about the north pole star (Polaris). This rotation takes one sidereal day. Some constellations, such as the Plough, are always above the horizon and these are called .
