Roughly three out of four stars in the Milky Way are red dwarfs: small, cool and dim. Even the Sun's nearest neighbour, Proxima Centauri, is too faint to spot without a telescope. The night sky you admire is a biased sample, dominated by rare, bright stars.
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.