What about the angular momentum principle? It essentially says that there is a property of objects called the angular momentum. You can change this angular momentum by applying a torque.

Where does the angular momentum go? To find the lost angular momentum, Peter Baum and members of his team at Konstanz began by magnetizing nickel crystals in a specific direction, then demagnetizing ...

There are two useful things about the Sun. First it is something with a known angular size. Second, the motion in the sky has a known angular speed (about 2 π radians in 24 hours). Now for the ...