Task: Text Categorization
Input (English): In Schwarzchild space, the Fokker-deSitter type of this behavior can occur, while in Kerr space an additional type of this behavior named for Schiff may occur. The Rashba effect causes one type of this phenomenon in spin, and another variety of it corrects for time dilation between electrons and the atomic nucleus and is named after Thomas. One type of this phenomenon is exploited in NMR spectroscopy and occurs when an external field is applied to magnetic moments, called the Larmor type. Irregularities in axial motion due to it are called nutation, and it is commonly demonstrated in gyroscopes. For 10 points, name this physical phenomenon in which the rotational axis of a body changes direction.
Output (English): Science