The stellar Parallax effect is used to measure the distance of nearer stars by observing their apparent motion.
The observed apparent change in an object's position brought on by a change in the observer's position is known as parallax. It specifically refers to the apparent movement of a nearby star as seen by an observer on Earth in the context of astronomy. Stellar parallax, on the other hand, is the apparent change in location of any close star (or another object) as compared to adjacent objects at a distance. According to the Copernican hypothesis, the relative motion between the Earth and a star results from the Earth's orbit around the Sun because a star can only be perceived to move about other, more distant celestial objects.
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