Q.

'Parsec' is the unit measurement of –

A. Density of stars
B. Astronomical distance
C. Brightness of heavenly bodies
D. Orbital velocity of giant stars
Answer» B. Astronomical distance
Explanation: Parsec is a unit of distance used in astronomy to measure large distances to objects outside our Solar System. It is equal to about 3.26 light years (3.086 x 1013 kilometres).
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