In a few billion years, the Sun will become a white dwarf: a core of carbon and oxygen holding about half its current mass, squeezed into a ball the size of Earth. As it cools, that matter freezes into a crystal lattice. In 2019, data from the Gaia satellite confirmed that white dwarfs in our galaxy really do crystallise.
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.