what you mean by Parallax's method
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Parallax is a method based on measuring two angles and sides of a triangle formed by the star, earth on one side and the other side six month later. ... Astronomers use an effect to find the distance to a nearby star. Its apparent displacement by comparing the distance of star respect to the earth
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Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines
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