Shrink the Sun to an 8-centimetre orange. Earth becomes a grain of sand 9 metres away, and Neptune circles at about 260 metres. But Proxima Centauri, the nearest star, would sit some 2,300 kilometres off. That's why our fastest probes would need tens of thousands of years to get there.
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.