The star S5-HVS1 once lived as part of a pair near Sagittarius A*, the Milky Way's central black hole. About 5 million years ago, the black hole captured its partner and flung the star out at some 1,800 km/s. It is still racing along at over 1,000 km/s and will leave our galaxy forever. Its discovery in 2019 offered the first clear case of this slingshot.
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.