Mantle Removal around Gully Fan
HiRISE PICTURE OF THE DAY: 4 DECEMBER 2025

Around a Gully Fan

A gully fan is preserved while surrounding mantle is being removed. This image can provide information about relative volatile content within the gully fans themselves. Mars Orbiter Camera data also shows bright units exposed on the flank of a gully fan where the mantle has been removed.



HiRISE Image of Exocomet 3I/ATLAS
HiRISE Image of Exocomet 3I/ATLAS
On 2 October 2025, MRO turned away from Mars to image 3I/ATLAS, only the third interstellar object ever observed passing through our solar system!

HiRISE Instrument News
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.

Complicated Lava Cooling
Complicated Lava Cooling
This HiRISE image shows a classic example of platy-ridged lava. Scientists think that this is the same as a lava type called “rubbly pahoehoe” on Earth.






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