Q. European Space Agency's GAIA satellite can measure stellar parallaxes to a precision of 10 micro-arcsecond. What is the distance of the farthest star to which GAIA can measure a parallax angle? a. 10 kpc b. 0.1 kpc c. 1000 kpc d. 100 kpc e. 1 kpc
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We know that the parallax angle ($p$) is measured in arcseconds and the precision of GAIA is $10$ micro-arcseconds, which is equal to $10 \times 10^{-6}$ arcseconds. Show more…
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