In: Physics
Use the inverse square law to estimate how the brightness of the Sun would change if you moved from Earth at 1 AU to Saturn's location at 10 AU (i.e., give a fraction or percentage, not magnitude). Then, the brightest known star is R136a1 with an absolute magnitude of -12.5, explain why you cannot make a precise determination of its brightness as seen from Earth without more information
Inverse square law: Brightness of a star is inversely proportional to square of the distance.
Distance of Sun from Earth
Distance of Sun from Saturn
Brightness of sun from earth is , brightness of sun from Saturn is
The brightness of Sun from Saturn appears to be ( ) times that of brightness of Sun from Earth.
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Absolute magnitude of R136a1 is
Luminosity of sun is
Luminosity of star is can be calculated using above values.
Brightness of star is
The distance of star from Earth is needed to determine precisely the brightness of star.
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