For far-away stars, astronomers approximate the distance by comparing the intensity of light coming from such stars with the intensity of alike stars at a distance of 10 parsecs (1 parsec = 3.09 * 1016m). Determine the intensity of the Sun at 10 parsecs? Evaluate how far (in parsecs) from the Earth is a alike star, which has a magnitude number more by 3 than the Sun observed from 10 parsecs? (The higher by one magnitude number star communicates to a 2.5 times lower light intensity from the star. Stars with lower magnitude numbers are higher).