What do we know about the Red Planet? About Mars? Because of rust or iron oxide, whose concentration in the planet’s soil reaches record levels, the entire surface of Mars has a brownish-reddish hue. The large, desiccated, dusty areas of the planet are like the deserts of the Earth, scorched by the red-orange sun. For this reason, almost everyone represents the Martian sunset as a pouring of different shades of red. However, in reality, strange as it may seem, everything is quite the opposite. Scattering the dust of doubt helped pictures taken by the rover Opportunity.
Not surprisingly, the red Martian sky colors the sun a cold blue. In the same color are painted all the Martian eclipses, sunrises and sunsets. And the reason is the high concentration of particles of the same planetary red dust in the atmosphere of the Red Planet.
Earth’s atmosphere can scatter blue light. As the light from the Sun reaches the boundaries of our atmosphere, the blue component of the light is reflected in any direction, some of the blue rays hitting the surface of the Earth. Thanks to this phenomenon, a person is able to observe the beautiful and unique blue-blue sky, which is so familiar to everyone. As for the other components of the light of the Sun, they pass through our atmosphere without any obstacles and reach the surface, as a result of which the Sun is observed in the spectrum, which is shifted to the red-yellow color area.
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But on Mars, the situation is quite the opposite. Because of red dust, the red component of sunlight is reflected, so the planet’s atmosphere is all red. And the blue component reaches the surface of the planet, which makes the Sun appear cold and blue from Mars. Because the concentration of dust in the atmosphere is directly proportional to the number of hurricanes and the strength of the wind near the surface, the color of the Sun can vary in a very wide range and has a pronounced seasonal pattern.