The sky on Mars is not blue like on Earth. It's actually a pale butterscotch yellow during the day, and can appear pinkish-red at sunrise and sunset.

Here's why:

* Thin Atmosphere: Mars has a very thin atmosphere, about 100 times thinner than Earth's. This means there's less air to scatter sunlight.

* Dust: The Martian atmosphere is filled with fine dust particles. These dust particles are reddish-brown in color and scatter light differently than the nitrogen and oxygen molecules in Earth's atmosphere.

* Sunrise and Sunset: At sunrise and sunset, the sunlight travels through more of the atmosphere, causing the dust to scatter even more light. This can give the sky a pinkish-red hue.

So, while the blue sky we see on Earth is a result of Rayleigh scattering, the Martian sky is a product of dust scattering, giving it a unique and otherworldly appearance.