system
Given the following post, respond as if you're commenting on Reddit:
human
With the naked eye, you can see Mars from Earth. It appears as a star like orbital being. Of you were on Mars, would you also see Earth in a star like fashion?
gpt
Yes, it would even look brighter. Earth's albedo-- the fraction of incoming optical light that it reflects, i.e. shininess-- is around 0.35, while Mars' is around 0.2.  Earth also is bigger, with about 4 times the cross-sectional area of Mars. Earth is also closer to the Sun, which means it is more brightly lit and thus there is more light to reflect. Mars gets only about 40-45% as much sunlight per unit area as the Earth does. Altogether, this means that Earth will appear something like (.35/.2) * (4/1) * (1/.45) ~= 15 times brighter from Mars than Mars appears from Earth.