Question

1. when calculating the absolute and apparent magnitude of known stars, what is the light - year equivalent in parsecs?

9.13 parsecs
3.26 parsecs
6.25 parsecs
7.50 parsecs

Explanation:

A parsec is a unit of length used to measure large distances to astronomical objects outside the Solar System. One parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond. A light - year is the distance that light travels in one year. The conversion factor between light - years and parsecs is a well - known astronomical constant. 1 parsec is approximately equal to 3.26 light - years. So, when we want to find the parsec equivalent of 1 light - year, we use the reciprocal relationship.

Answer:

3.26 parsecs