* The Doppler Effect: The Doppler effect describes how the frequency of waves (like light) changes when the source of the waves and the observer are moving relative to each other.

* Moving Away: When a source of light moves away from an observer, the wavelengths of the light are stretched, making them appear redder. This is called a redshift.

* Moving Together: While the star is moving in the same direction as Earth, it's still moving *away* from us. The star is not stationary, and the speed of Earth is much slower than the speed of light. Therefore, the relative motion between the star and Earth is still one where the star is moving away.

Important Note: The amount of redshift would be very small, as the Earth's speed is much slower than the speed of light. Detecting such a small redshift would require very precise instruments.