In 2022, the DART spacecraft deliberately crashed into Dimorphos, a small asteroid posing no threat to Earth. The impact shortened its orbit around its companion by 32 minutes, far beyond the mission's target. It was the first time humans changed the path of a celestial body: a dress rehearsal for planetary defence.
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.