Parallax is the apparent change in the direction of an object when the observing position changes. Stellar parallax uses Earth's orbital baseline and measures half the annual angular excursion; its standard distance relation is the one displayed. A nearer object has a larger parallax for the same baseline.
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Parallax is an effect that describes the apparent shift in the position of an object when viewed from different angles or perspectives. This phenomenon occurs because our viewpoint changes, allowing us to see different aspects of an object. In astronomy, parallax is used to determine the distance of stars and other celestial objects. By observing a star from two different points in Earth's orbit around the Sun (typically six months apart), astronomers can measure the angle of apparent shift against more distant background stars.