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A layer within the Sun where the internal plasma movements change from the rigid rotation of the inner radiative zone to the differential rotation of the outer convective zone. This occurs about 70% of the way from the Sun's core to the surface, although this varies with latitude, being slightly more distant at higher latitudes. The thickness of the tachocline is believed to be around a few per cent of the Sun's radius.

Subjects: Astronomy and Astrophysics.

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