Five Thousand Sols Later: Curiosity’s Most Remarkable Mars Photographs

As of August 30, 2026, NASA’s Curiosity rover has witnessed over 5,000 sunrises and sunsets on Mars, continuing its mission to determine whether life ever existed there. Originally designed for a two-year operation, the rover remains functional more than 14 years after its August 2012 landing. Over its extended lifespan, Curiosity has endured global dust storms and ascended over 3,200 feet (1,000 meters) up a mountain, despite sustaining significant tire damage. The rover continues to use its 17 cameras to capture hundreds of photos each sol, transmitting over 780,000 images back to Earth for scientific analysis and navigation planning. To commemorate the rover’s 5,000th day on the Red Planet, we present ten of the most iconic photographs it has captured.

Sol 548: Mount Sharp on the Horizon

Curiosity captured this image of Mount Sharp on February 19, 2014, roughly eighteen months after landing. Scientists initially hoped the rover could reach the base of the 3.4-mile-high (5.5 km) mountain to investigate terrain previously observed from orbit. Over the years, Curiosity far exceeded this objective, traversing more than 23.6 miles (38 km) from its landing site and climbing over half a mile into the mountain’s foothills, all while conducting vital scientific research.

Sol 956: Blue Skies on Mars

On April 15, 2015, Curiosity captured the first color image of a Martian sunset, revealing a brilliant blue sky just as the sun descended behind distant, shrouded mountains. Typically, the Martian sky appears yellow to orange. Fine dust particles scatter red and yellow light across the atmosphere, but their size allows some blue light to pass through, making the sky near the sun appear blue. This effect is most pronounced when the sun is low on the horizon.

Sol 1128: Curiosity Selfie at Namib Dune

Curiosity has taken many selfies throughout its mission, though the process is more complex than simply holding up a camera. This particular selfie, composed of 57 separate images taken on January 19, 2016, using a camera mounted on its robotic arm, shows the rover next to Namib Dune. This dark sand dune is part of the Bagnold Dune Field near Mount Sharp. Curiosity sampled the sand for analysis and scuffed the dune with its wheels, allowing scientists to observe how the sand moved.

Sol 1819: Curiosity Leaves a Thumbprint in the Dust

Mars is extremely dusty, with reddish particles swept into the atmosphere and covering most of the planet’s surface, complicating the identification of surface materials. On September 17, 2017, Curiosity cleared the dust from a rock at Vera Rubin Ridge and photographed it for geologists to compare with terrestrial rocks. The reddish-purple hue suggests the rock is fine-grained hematite fractured and filled with calcium sulfate minerals, hinting that Mars may be more colorful beneath its dusty exterior. Scientists have since discovered ruby-like materials embedded in Martian rocks.

Sol 3466: The Mystery of the Martian ‘Doorway’

On May 7, 2022, Curiosity sent back an intriguing image that appeared to show a small door carved into a cliff face. While it is easy to imagine Martians entering through it, the 3-foot-tall opening is not an actual doorway. According to NASA, the boxy shape resulted from vertical fractures intersecting with horizontal rock layers. The cliff is highly fractured, and a large chunk of rock that likely fell from the “doorway” is clearly visible nearby.

Sol 3724: The Iridescent Cloud

Shortly after sunset on January 27, 2023, Curiosity photographed a noctilucent, or night-shining, cloud forming much higher in the Martian atmosphere than typical clouds. While clouds on Mars are rare, this one is particularly exceptional. Its high altitude makes it exceptionally cold, leading scientists to believe it is composed of carbon dioxide (dry ice) rather than water ice. The iridescent colors suggest the ice particles are uniformly sized, indicating the cloud likely formed around the time the photo was taken.

Sol 3725: Curiosity Discovers ‘Cacao’

The day after observing the cloud, on January 28, 2023, Curiosity identified an iron-nickel meteorite approximately a foot across. Nicknamed “Cacao,” it is one of several meteorites the rover has photographed. Curiosity used a laser to zap part of the meteorite and analyzed the vapor released to determine its composition. Because Mars is cold and dry compared to Earth, meteorites survive much longer on its surface, offering clues about atmospheric changes over time. The discovery of large iron meteorites on Mars suggests the planet once possessed a denser atmosphere than it does today.

Sol 4208: The Discovery of Elemental Sulfur

In June 2024, Curiosity accidentally ran over a rock, crushing it to reveal a yellow, odorless surprise: rare crystals of elemental sulfur. Although Mars contains plenty of sulfur-bearing minerals like sulfate, this was the first time pure sulfur was found. The crystal fragments measure about 5 inches (12.7 centimeters) across. On Earth, pure sulfur forms from volcanic and hydrothermal activity along with other geological processes, but how these crystals formed on Mars remains unclear.

Sol 182-4263: A Collection of 42 Drill Samples

Curiosity has collected and analyzed 42 rock samples using a small drill attached to its robotic arm. The drill pulverizes the rock so samples can be transported to the rover’s science instruments to measure their chemical composition. Each sample site is carefully selected because the rover has a limited number of special sample cups. This mosaic image showcases the impressive variety of materials Curiosity has drilled into.

Sol 4671: Exploring Martian Spiderwebs

Researchers have long been fascinated by large geologic structures resembling stone “spiderwebs” on the Martian surface, previously observed by orbiting spacecraft. Curiosity explored these structures on the ground, capturing this image of the low ridges and hollows, known as boxwork, on September 26, 2025. These ridges, formed by hardened minerals deposited by water seeping into cracked rock, remain after billions of years of erosion wore away the softer surrounding rock. Curiosity’s journey continues today. After leaving the boxwork structures in March, the rover ventured further into the Martian landscape with its cameras active, searching for more evidence that Mars once had the water and chemistry to possibly support ancient microbial life.

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