M
marjcudal
Guest
<p>I have read an article regarding the true color of planets such as Mars. The author said that the martian rovers used filters which are not really designed for the "true color" picture. The filters on the rovers do not correspond to the color sensitivity of the human eye. Some of the filters only let through infra-red light, which is invisible to our eyes. He also added that the reason why colors in the images are a bit weird at times. Sometimes, the infrared filters are used. Other times, the way the three-color image was constructed may be too heavy in the red, or the blue, distorting the colors. Worse, as lighting changes, so do the colors! When the Sun is high, the colors look different than when it is low. The amount of dust in the air ruins the color balance as well. Even worse, dust scatters light. The sky near the Sun looks bluer in images from Mars because the dust in the air "forward-scatters" blue light; in other words it takes blue light from the Sun and focuses it more toward the camera. The sky near the Sun looks bluer, and farther away it looks redder. Light reflecting off the rocks can also suffer from all sorts of color imbalances too.</p><p> </p><p>Is this true? Are there any proof or pictures that would prove that Mars is not-always-red? </p>