Newly released Mars images provide a detailed look at one of the red planet’s oldest and most cratered regions, highlighting a landscape shaped by billions of years of impact, volcanism and erosion.
The European Space Agency (ESA) shared images of a region known as Arabia Terraa sprawling, ancient region i March’ the Northern Hemisphere is believed to be more than 3.7 billion years old. The photos were taken by ESA’s long-distance runner Mars Express orbiter on October 12, 2024, during its 26,233. orbit the planet. But the shots were only recently processed into a richly detailed color and topographic display, according to a statement from the space agency.
Directly to the left of Trouvelot is another large pool which appears even older and more heavily eroded, with the edge almost completely worn away. Trouvelot cuts into this degraded craterindicating that the neighboring basin formed first.
The floor is almost entirely covered by dark, mineral-rich rock – known as mafic material – which contains magnesium, iron and minerals such as pyroxene and olivine. Scientists believe these volcanic rocks may have been excavated by impact events and later redistributed by wind and gravity, a process seen in many craters across Arabia Terra.
The picture was taken with Mars Express’ Stereo camera with high resolution (HRSC), which has been mapping the planet since the spacecraft arrived in 2003. Rather than representing an entirely new snapshot, the release highlights the continued scientific value of processing archived data — extracting new details and context from observations made months or even years ago, according to the statement.
Across the frame, dark streaks and patches probably mark volcanic materials, while crescent-shaped barchan dunes trace the direction of Martian winds which still sculpt the surface today. A lightly tinted mound about 20 km long, etched with ridges and grooves, may reveal minerals that formed or were altered in the presence of water, which as a result usually appear much lighter than the surrounding terrain. Together, these features illustrate the processes that have shaped Arabia Terra over billions of years.
After more than two decades in orbit, Mars Express continues to provide valuable views of the Red Planet’s surface. The newly released images are a reminder that even well-studied areas of the Red Planet can yield new scientific insights when older observations are revisited with improved processing and analysis.
