WASP-76b orbits so close to its star that one side always faces it, heated to over 2,400 °C: hot enough to vaporise iron. Fierce winds carry that vapour to the cooler night side, where it condenses. ESO astronomers, who observed the effect in 2020, think droplets of iron most likely rain down there.
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.