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Phenomenon of Stellar Parallax-printing
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Phenomenon of Stellar Parallax-printing


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Against a very distant seemingly "fixed star" background, any relatively nearby star will display an apparent movement as the Earth makes its yearly orbital transit about the Sun. This apparent movement produces an angle of perception called "angle of Parallax" which is used to measure the distance to the star from Earth. The Method of Parallax for determining astronomical distances to nearby stars is therefore a heliocentric method. This phenomenon is similar as to when an object is held at arm's length and seems to move against a more distant background as each eye is opened and closed. However at extreme distances the angle of Parallax becomes infinitesimally small and hence unusable.

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