A star has a parallax of .05". Its distance is
A) 5 light- years.
B) 200 parsecs.
C) 66 parsecs.
D) 20 parsecs.
E) 660 light- years.

Name: A star has a parallax of .05". Its distance is A) 5 light- years. B) 200 parsecs. C) 66 parsecs. D) 20 parsecs. E) 660 light- years.
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Question

Quizplus · Accepted Answer

The distance to a star in parsecs is the reciprocal of its parallax angle in arcseconds. Therefore, 1 / 0.05" = 20 parsecs.

A Star Has a Parallax of