Essay
Compare the volume of the Sun with the volume of interstellar space it occupies.Is the occupied percentage large or small? Consider the volume around the Sun to be a sphere whose radius is equal to the distance to the nearest star,which is equal to 5 light-years.(Note: the radius of the Sun is 7 × 105 km,and 1 light-year = 9.5 × 1012 km. )
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