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Unformatted text preview: the motion is not directly away from the sun.) 6 7similar concept http://answers.yahoo.com/question/index?qid=20101120130510AAK0HD4 8 9 similar Stars A and B are equally bright as seen from earth, but A is 60pc away while B is 15pc away. ..? Which star is brighter? How much brighter? • 2 years ago • Report Abuse by ronwizfr Member since: October 02, 2006 Total points: 90,139 (Level 7) • Add Contact • Block Best Answer - Chosen by Asker The further star in intrinsically brighter. As brightness falls of as the distance squared star A is 4^2=16 times brighter than B. • 2 years ago • Report Abuse 10 same like 9. 11 similar like http://answers.yahoo.com/question/index?qid=20101112013429AAmUdxK 12may be the ans. As the flux falls off with the distance squared, the Earth would have to be sqrt(1370) = 37 times further away, more or less at the distance of Pluto. 13 14 15 1 18 19...
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- Spring '12
- Work, Astronomical unit, Proxima Centauri