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A nearby star's apparent movement against the background of more distant stars as the Earth revolves around the Sun is referred to as parallax.
Definition of parallax, a method used to measure the distance to stars.
Interactive site showing users the concept of parallax - the idea of seeing the same image from different views.
Simulations of star systems: stellar parallax and binary stars.
Short video on how we can use the parallax method to measure distances to nearby stars.
Great explaining on how we measure distances to stars using parallax and distances to galaxies using Cepheid Variables stars.