The full Moon looks brilliant, but its surface reflects only about 12% of the light that hits it, roughly like a worn asphalt road. It looks white because it stands out against a black sky and is bathed in direct sunlight. Placed next to fresh snow, it would look dark gray.
A large share of Earth's water molecules formed in the interstellar cloud that existed before the Sun was even born, more than 4.6 billion years ago. You are literally drinking a cosmic fossil.
By day, the Martian sky looks butterscotch because of fine dust hanging in the air. But at dusk, those same grains scatter blue light forward, creating a bluish glow around the Sun. Rovers have photographed these blue sunsets: the exact reverse of what we see on Earth.