👉For the first time ever, humanity is seeing something that once lived only in imagination — a real sunset on Mars. Thanks to a NASA rover, we now have an authentic photo of the Sun dipping below the Martian horizon. That makes us the first generation in history to witness this incredible sight. But a Martian sunset doesn’t look like the golden glow we know on Earth. Instead, the sky takes on soft blue tones. This happens because fine dust in Mars’ thin atmosphere scatters sunlight differently,

The Atmosphere: Getting a Handle on Carbon Dioxide - NASA Science