The apparent position of stars in the night sky changes over the course of a year due to the Earth's orbit around the sun. As the Earth moves in its orbit, the position of the stars appears to shift relative to the observer on the ground. Additionally, the visibility of certain stars in the night sky is affected by the time of year, as well as the latitude and longitude of the observer.
The position of stars in the night sky is affected by the Earth's axial tilt, which causes different constellations and stars to be visible at different times of year from different locations on Earth. For example, the North Star, also known as Polaris, is visible in the northern hemisphere all year round, but its position in the sky changes depending on the time of year. Other stars and constellations, such as Orion, are only visible at certain times of the year, depending on the Earth's position in its orbit.
In summary, the visibility of stars in the night sky is affected by a combination of factors, including the Earth's orbit and axial tilt, the time of year, and the latitude and longitude of the observer.