NASA Satellite Captures Striking New Images of the Sahara’s Enigmatic ‘Eye of Africa’

New satellite imagery released by NASA has offered a breathtaking fresh look at the Richat Structure, the massive circular geological formation in the Sahara Desert often called the ‘Eye of the Sahara.’ The nearly 30-mile-wide feature in western Mauritania continues to captivate geologists, astronauts, and the public alike, more than half a century after it was first spotted from orbit.

The Richat Structure, also known as Guelb er Richât, first drew international scientific attention in 1965, when astronauts aboard Gemini IV photographed its unmistakable bullseye pattern jutting out of an otherwise featureless expanse of Saharan dune and rock. In the decades since, the formation has become one of the most recognizable geological features visible from low Earth orbit, frequently used as a calibration target for orbital cameras and a reference point for astronauts photographing the African continent. The newly released imagery, captured by NASA’s fleet of Earth-observing satellites, showcases the formation’s banded rings in unprecedented clarity, with differential erosion creating a near-perfect concentric pattern visible across hundreds of square kilometers.

Early hypotheses held that the Richat Structure was the scar of a massive meteorite impact, a theory that gained traction because of its circular symmetry. However, subsequent fieldwork found none of the telltale signs of hypervelocity impact — no shocked quartz, no impact melt breccia, and no crater rim structure. Later research, including work by Canadian and French geological teams in the 2000s, concluded that the feature is instead a deeply eroded geological dome, where uplifted sedimentary and igneous rock layers of varying hardness have been exposed and weathered at different rates over hundreds of millions of years. The resulting topography — quartzite ridges separated by valleys of softer rock — creates the ring pattern that gives the structure its distinctive appearance from above.

Beyond its visual appeal, continued satellite observation of the Richat Structure serves practical scientific purposes. Researchers use the formation to study erosion dynamics in hyper-arid environments, track dust transport patterns across the Sahara, and calibrate remote-sensing instruments. As climate change accelerates desertification in parts of the Sahel and reshapes atmospheric dust patterns that reach as far as the Amazon basin, detailed monitoring of Saharan landforms is becoming increasingly relevant to global environmental modeling. Future missions, including higher-resolution Earth-imaging satellites scheduled for launch in the coming years, are expected to provide even more detailed views of this and other unique desert features.