... Credit Copyright: Mars Exploration Rover Mission , Texas A , Cornell , JPL , NASA Explanation: This month, the Mars Exploration Rovers are celebrating their 5th anniversary of operations on the surface of the Red Planet. ... Of course, fine martian dust particles suspended in the thin atmosphere lend the sky a reddish color, but the dust also scatters blue light in the forward direction, creating a bluish sky glow near the setting Sun. ... 2005 2006 . ... Publications with keywords: sunset - dust . ...