On January 1, 2019, the New Horizons probe swept past Arrokoth, more than 6 billion kilometers from the Sun. This icy body, about 36 km long, is made of two lobes that merged very gently, at roughly walking speed. Untouched for 4.5 billion years, it shows what the building blocks of planets looked like.
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.