Question

Explain Parallax method in detail .

Answer 1

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.

Correction of parallax error:  

If two objects are placed at the same distance from the eye, there will be no relative shift between them. If they are at different distances, the nearer object moves in a direction opposite to that of the eye and farther one in the same direction. Once their relative positions are known, they can be brought to one position by suitable shifting. When the two objects occupy the same position in space with respect to the eye, then the apparent shift disappears and it is said that the parallax error has been removed.


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Answer 2

astronomers can measure a star's position once, and then again 6 month later and calculate the apparent change in position . the star's apparent motion is called steller parallax . the distance is measured in parsecs and the parallax angle is measured in arcseconds . THANK YOU