The Sun as seen from Earth has an apparent magnitude of -26 in the B-band. 1. What would its apparent magnitude be as seen from Jupiter? (Jupiter is approximately 5.2 AU from the Sun.) 2. At a certain distance d from a Star A, its apparent brightness is f. If we were to travel at a relativistic velocity to a point in space which is 5 times further away, how much fainter would the star appear to us? (i.e. what fraction of its original apparent brightness would it now appear to us?)

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The Sun as seen from Earth has an apparent magnitude of -26 in the B-band.

1. What would its apparent magnitude be as seen from Jupiter? (Jupiter is approximately 5.2 AU from the
Sun.)
2. At a certain distance d from a Star A, its apparent brightness is f. If we were to travel at a relativistic
velocity to a point in space which is 5 times further away, how much fainter would the star appear to us?
(i.e. what fraction of its original apparent brightness would it now appear to us?)

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