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Physics - Formulas - Parallax

Our abilities as humans to determine distance to an object is a result of the brains process of visual data. Both our eyes work in tandem to that any shift from one eye to another allows for a determination of distance. This is called parallax, or change in an objects position based on the point of view of the observer. The same effect works in stars (that are nearby only). This effect can be measured:

One of the nearby stars is Barnard's Star. It has a parallax angle of 0.547 arcseconds. To find the distance:

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