Neptune, the planet farthest from the Sun, has the fastest winds in the solar system: around 2,000 km/h, faster than sound travels in Earth's air. The paradox is that it gets very little solar energy. Scientists still don't fully understand how such a cold, dim world powers storms this violent.
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.