New answers tagged neptune
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The brightness of a Solar System object, seen in reflected light, depends on how far it is from the Sun, $d_s$, and how far away it is from the observer, $d_o$, (and the angles between them). Both dependencies are "inverse square laws":
$${\rm brightness} \propto \left(\frac{1}{d_s^2}\right)\left(\frac{1}{d_o^2}\right)\ . $$
Both Uranus and Neptune ...
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If I have calculated it right then the apparent magnitude of Neptune as seen from Uranus is approximately 4.
The absolute magnitudes of Neptune (-7.11) and Uranus (-7.00) are nearly identical.
The apparent magnitude of Uranus is 5.38.
The distance between Neptune and Uranus is roughly half of the distance between Earth and Uranus.
At half the distance a ...
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