Human: What is the difference between a gyroscope and an accelerometer? Assistant: 
The main difference between a gyroscope and an accelerometer is that a gyroscope measures angular velocity, while an accelerometer measures acceleration. Angular velocity refers to the rate of change in angle, or how fast an object rotates around its axis, whereas acceleration is the measure of the rate of change in speed over time. A gyroscope can detect changes in direction and angular position, such as when you turn your head, but it cannot tell you what the current orientation of the device is. An accelerometer on the other hand can tell you where the device is currently facing, but it does not provide any information about how the device has been moving.