Editing Sunset (section)

===Mars===
{{See also|Astronomy on Mars}}
[[File:MarsSunset.jpg|thumb|Sunset on [[Mars]]]]

On [[Mars]], the setting Sun appears about two-thirds the size it does from [[Earth]],<ref>{{cite web |url=http://photojournal.jpl.nasa.gov/catalog/PIA07997 |title=A Moment Frozen in Time |date=June 10, 2005 |publisher=[[Jet Propulsion Laboratory]] |access-date=September 7, 2011}}</ref> due to the greater distance between Mars and the Sun. The colors are typically hues of blue, but some Martian sunsets last significantly longer and appear far redder than is typical on Earth.<ref name=apod/>
The colors of the Martian sunset differ from those on Earth. Mars has a thin [[atmosphere]], lacking [[oxygen]] and [[nitrogen]], so the light scattering is not dominated by a [[Rayleigh scattering|Rayleigh Scattering]] process. Instead, the air is full of [[Martian soil|red dust]], blown into the atmosphere by high winds,<ref name=apod>{{Cite APOD |title=Sunset Over Gusev Crater |date=June 20, 2005 |access-date=September 6, 2011}}</ref> so its sky color is mainly determined by a [[Mie theory|Mie Scattering]] process, resulting in more blue hues than an [[Earth]] sunset. One study also reported that Martian dust high in the atmosphere can reflect sunlight up to two hours after the Sun has set, casting a diffuse glow across the surface of Mars.<ref name=apod/>