How far out into space can distances be determined using telescopes on Earth if stellar parallax values no smaller than 0.01 arcsec can be measured?
A) 10 pc
B) 100 pc
C) 500 pc
D) 2000 pc

Question

Quizplus · Accepted Answer

The distance in parsecs can be determined using the formula $d = \frac{1}{p}$, where $d$ is the distance in parsecs and $p$ is the parallax angle in arcseconds. If the smallest measurable parallax is 0.01 arcsec, then the maximum distance measurable is $d = \frac{1}{0.01} = 100$ parsecs.

How Far Out into Space Can Distances Be Determined Using