If a star's distance is 10 pc,what is its parallax?
A) 0.01 arcsec
B) 0.05 arcsec
C) 0.1 arcsec
D) 0.5 arcsec

Name: If a star's distance is 10 pc,what is its parallax? A) 0.01 arcsec B) 0.05 arcsec C) 0.1 arcsec D) 0.5 arcsec
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Question

Quizplus · Accepted Answer

The formula for parallax is:
parallax (in seconds of arc) = 1/distance (in parsecs)
Plugging in the given distance of 10 pc into the formula, we get:
parallax = 1/10 = 0.1 arcsec. Therefore, the best choice is C.

If a Star's Distance Is 10 Pc,what Is Its Parallax