Note: Any images of the interstellar comet 3I/ATLAS are considered NASA-wide news.
Because the federal government is in shutdown, communications of NASA news have been suspended.


Light-Toned Deposit in Arsinoes Chaos
HiRISE PICTURE OF THE DAY: 22 OCTOBER 2025

A Light-Toned Deposit in Arsinoes Chaos

The objective of this observation is to examine a light-toned deposit in a region of chaos terrain. The deposit displays a rough surface, in contrast to the smoothness of the surounding area. Some parts of the surface appear as if they were eroded by a fluid flowing north and south. This deposit may have formed in an ancient lake.



HiRISE Instrument News
Since July 23, 2023, HiRISE observations have lacked data from the RED4 CCD due to a hardware issue, creating a gap in the middle of image products and reducing the color swath to 1 CCD width. We are investigating the hardware issue and may be able to acquire some RED4 data in the future.

Icy Cliffs at the Martian North Pole
In the spring, we also sometimes see avalanches pouring down these cliff faces and this image was taken to search for more of them.