On Mars, the sun comes and goes with a blue glow. On Uranus, the sunset sky transitions from blue to turquoise, according to NASA. And on Titan, one of Saturn's moons, the sky turns from yellow to ...

That turquoise is caused by the ozone in the upper ... the color of an Earth’s sunset. The shadow cast by Earth consists of two concentric cones, the penumbra, the pale outer shadow, and the ...