An astronomy problem?

T

Thomas T

New member
apparent brightness and flux are the same
thing.
What is the apparent brightness of the Sun
as seen on Jupiter?
Jupiter is 5.34 times farther from the Sun
than the Earth. Assume apparent brightness
of the sun seen at Earth is 1300 W/m2. An-
swer in units of W/m2.

Here is a homework question I have. I thought that I figured it out, but my answer wasn't right. Can anyone show me how to set this up? I tried solving for Luminosity using the flux and distance from earth, but it didn't come out right. I also tried 4pi(149.6e9)(1300)=4pi(7.99e11)F, and solved for F, but it wasn't right either.
 
The apparent brightness just varies as the inverse square of distance.

So the brightness at Jupiter is just the brightness at earth, times the square of the distance from sun to earth divided by the square of the distance from sun to Jupiter.
 
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