In December 1995, the Hubble telescope spent about ten days staring at a tiny area near the Big Dipper, picked because it looked empty: roughly one hundredth the area of the full Moon. The result: some 3,000 galaxies, some seen as they were more than 10 billion years ago. Wherever you look, the sky teems with galaxies.
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.