The star S2 completes an orbit around Sagittarius A* in about 16 years. At its closest, it passes some 120 times the Earth-Sun distance from it, reaching about 2.5% of the speed of light. During its 2018 pass, its light arrived slightly reddened by the black hole's gravity, exactly as Einstein's general relativity predicts.
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.