What is horizontal parallax?

Horizontal parallax refers to the apparent shift in the position of an object when viewed from different horizontal angles or perspectives. This phenomenon is commonly observed in astronomy, where the position of a nearby star appears to change against the background of more distant stars as the Earth orbits the Sun. The measurement of horizontal parallax is crucial for determining the distances to celestial objects. It is also applicable in various fields, including Photography and 3D imaging, to create depth perception.