Q.

Which of the following is the unit of Astronomical Distance?

A. metre/sec.
B. Sec.
C. Para/sec.
D. Parsec
Answer» D. Parsec
Explanation: A parsec is a unit of length used to measure large distances to objects outside our Solar System. One parsec is the distance at which one astronomical unit subtends an angle of one arc second. A parsec is equal to about 3.26 light-years in length.
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