Because it isn't solid, the Sun spins faster at its equator, about once every 25 days, than near its poles, where a turn takes over 30 days. This uneven rotation twists its magnetic field lines like a rubber band being wound up. That's what drives sunspots and the flares that sometimes disrupt our satellites.
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.