Aurorae Sinus is a dark feature in the southern hemisphere of the

planet A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a you ...

Mars Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury. In the English language, Mars is named for the Roman god of war. Mars is a terrestrial planet with a thin at ...

. Together with

albedo Albedo (; ) is the measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that refl ...

features contributed by Aonius Sinus and Solis Lacus, it is part of a feature known as the "eye of Mars". A albedo feature is an area which shows a contrast in brightness or darkness (albedo) with adjacent areas.

References

Albedo features on Mars {{Mars-stub