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

planet A planet is a large, Hydrostatic equilibrium, rounded Astronomical object, astronomical body that is generally required to be in orbit around a star, stellar remnant, or brown dwarf, and is not one itself. The Solar System has eight planets b ...

Mars Mars is the fourth planet from the Sun. It is also known as the "Red Planet", because of its orange-red appearance. Mars is a desert-like rocky planet with a tenuous carbon dioxide () atmosphere. At the average surface level the atmosph ...

. Together with

albedo Albedo ( ; ) is the fraction of sunlight that is Diffuse reflection, diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects ...

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