The Sun gives off every colour at once, peaking in blue-green, and your eye blends them into white. Our atmosphere scatters away some of the blue, tinting the solar disc yellow, then orange at sunset. From orbit, astronauts see it as a dazzling white.
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.