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.


Valleys and Inverted Channels in Melas Chasma
HiRISE PICTURE OF THE DAY: 3 NOVEMBER 2025

Once in Melas

This stunning observation shows part of the western end of a basin within Melas Chasma: a series of interstratified valleys and inverted channels. The Melas region provides several clues to the morphological and geological development of Valles Marineris, where the chasma is located.



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.

Glacial (Ice) or Lava Flow?
Glacial (Ice) or Lava Flow?
The geologic setting and latitude here suggest this is a glacial (ice-rich) flow, but the surface is broken into plates like many lava flows on Mars.






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