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Question

the parallactic angle subtended by a distant star is 0.86'' on the earth's orbital diameter (1.5*10^11 m). the distance of the star from the earth is

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Solution

Dear student,

Let D be the distance of the star from the earth.

The parallax angle is, θ = 0.76 rad

Distance between the two observation points, d = 1.5 × 1011 m

We know,

D = d/θ

=> D = (1.5 × 1011)/0.86 = 1.74 × 1011 m

Regards


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