On May 28, 2021, the Perseverance mars rover captured two images of the same landscape. Image 1 shows a possible UFO flying above the surface of Mars (Time 11.36.48) but Image 2, captured 10 minutes earlier, shows No UFO (Time 11.26.48).
At first glance, the small light source looks like a camera artifact but after adjusting brightness and contrast, the image shows us the shape of a UFO and the thrust that moves the UFO forward.
Source:
https://mars.nasa.gov/mars2020/multimedia/raw-images/LRF_0096_0675459494_571EBY_N0040136SCAM04096_0050I6J
https://mars.nasa.gov/mars2020/multimedia/raw-images/LRF_0096_0675458878_572EBY_N0040136SCAM04096_0010I6J