34. 'Parsec' is the unit measurement of A.Density of stars B.Astronomical distance C.Brightness of heavenly bodies D.Orbital velocity of giant stars
Option B Solution: One parsec is the distance to an object whose parallax angle is one arcsecond. The radius of the Earth's orbit equals one astronomical unit (AU), so an object that is one parsec distant is 206,265 AU (or 3.26 light-years) away.
