The star that appears almost stationary in the sky is our own Sun. From our vantage point on Earth, the Sun appears to rise in the east, move across the sky during the day, and set in the west. However, in reality, it is the Earth's rotation that causes this apparent movement of the Sun.
Other than the Sun, all other stars in the night sky appear to move due to the rotation of the Earth. This rotation causes the stars to appear to rise in the east, move across the sky, and set in the west, similar to the path of the Sun during the day. The apparent motion of the stars is due to the Earth's rotation on its axis, which takes approximately 24 hours to complete.
However, it is worth noting that due to the tilt of the Earth's axis and its elliptical orbit around the Sun, different stars and constellations become visible at different times of the year. This phenomenon is known as the seasonal or annual motion of the stars, and it is not as noticeable as the daily motion caused by the Earth's rotation.