An enigmatic dark silhouette spotted by NASA’s Curiosity rover in Gale Crater on August 20, 2023, has sparked intense debate among space enthusiasts, with online observers comparing the tripod-like anomaly to a jellyfish, a mechanical walker, or an alien structure that vanished in less than a minute.
When NASA’s Curiosity rover trundled across the dusty slopes of Gale Crater, it recorded a panorama that quickly divided internet observers and space researchers alike. The black, spindly figure standing on the horizon featured a bulbous body balanced on thin legs, prompting immediate comparisons to cephalopods, science fiction machinery, and extraterrestrial architecture.
The Curiosity Rover Panorama and the Disappearing Object
The image in question was captured on August 20, 2023, at around 6:27 p.m. Eastern Time, roughly 3,924 Martian days into the mobile laboratory’s mission. Operating in the 96-mile-wide Gale Crater, an ancient meteor impact crater, the 1,000kg mobile laboratory used its Right Navigation Camera to snap the black-and-white landscape.
The mystery deepened when independent observers noted the timeline of the camera sequence. The dark object appears in a frame, yet an identical photograph taken less than 10 seconds prior shows the exact same patch of Martian terrain entirely empty.
Adding to the intrigue, that specific frame was the final image transmitted by Curiosity for that Martian day. The next public photograph released by NASA came nearly two hours later, with the camera pointing in an entirely different direction.
Social Media Discovery and Extraterrestrial Speculation
The photograph gained renewed attention after space enthusiast Kari Sivertzen flagged the image on the social media platform X while rummaging through public archives. Sivertzen noted an ongoing interest in scouring rover files for unexplained visual anomalies, stating a personal belief in extraterrestrial life given previous agency findings. Sivertzen told followers: ‘Sometimes I spot things that catch my eye, and I share them here. I believe there is life on other planets, and since NASA has found potential traces of life on Mars, it’s the perfect place to look.’
Social media users reacted with a mixture of awe and humor. While some commentators hailed it as one of the best Mars UFO photographs I've seen!
, others suggested it resembled a First image of a jellyfish UFO [on] Mars
, or a towering war machine from science fiction.
Expert Commentary and Comparison to Past Anomalies
Independent researchers weighed in on the anomalous silhouette. Mars researcher Jean Ward commented on the object, branding it a ‘Jellyfish-shaped UFO/UAP spotted on Mars’ and suggesting that it ‘seems to be interacting with the surface’ while resembling a ‘tripod-object’.
‘As always, until we get boots on the ground to see these anomalies up close, I can only speculate as to what these objects might be,’
Jean Ward, Mars researcher
Skeptics quickly offered grounded counter-explanations. Rather than biological or technological artifacts from an ancient civilization, space officials and skeptics frequently attribute such solitary shapes to an image or video error, the shadow of a rock, or standard psychological pareidolia—the human tendency to perceive familiar shapes in ambiguous visual data. Similar past sightings on the Red Planet have included egg-shaped holes, spiders, rolling hills that resemble the ruins of a city, and a crowned face.
Geographic Realities and Planetary Science Context
Some internet sleuths attempted to connect the sighting to active robotic hardware on the planet, speculating that the figure might be the Ingenuity Mars Helicopter. However, Sivertzen insisted it wasn’t Ingenuity, a tiny helicopter that stands on spindly legs. Geographical checks debunked this theory immediately.
Ingenuity operated as a scout alongside the Perseverance rover, which was about 2,300 miles away in the Jezero Crater. Curiosity, meanwhile, explores Gale Crater, which is roughly 2,300 miles (3,700 kilometers) away from Perseverance.
While Curiosity has been trundling across Mars since 2012, tasked with one central question of whether the Red Planet could ever have supported microbial life, its cameras have sent back hundreds of thousands of images of rock formations, dust devils, and empty horizons during its mission.
What Remains Unresolved in the Archives
Without a confirming second frame or official agency comment directly addressing the silhouette, it is difficult to determine from currently available photos whether the object actually moved, approached the Curiosity rover, or was simply the result of a temporary imaging error during the shooting process. As archivists continue combing through public image repositories, the true nature of the Martian anomaly remains purely a matter of speculation.
