PDS logoPlanetary Data System
PDS Information
Find a Node - Use these links to navigate to any of the 8 publicly accessible PDS Nodes.

This bar indicates that you are within the PDS enterprise which includes 6 science discipline nodes and 2 support nodes which are overseen by the Project Management Office at NASA's Goddard Space Flight Center (GSFC). Each node is led by an expert in the subject discipline, supported by an advisory group of other practitioners of that discipline, and subject to selection and approval under a regular NASA Research Announcement.
Click here to return to the Photojournal Home Page Click here to view a list of Photojournal Image Galleries Photojournal_inner_header
Latest Images  |  Spacecraft & Technology  |  Animations  |  Space Images App  |  Feedback  |  Photojournal Search  

PIA25707: Going with the Flow
This image acquired on October 24, 2022 by NASA's Mars Reconnaissance Orbiter shows Harmakhis Vallis, an approximately 800-kilometer long outflow channel located in eastern Hellas.
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Reconnaissance Orbiter (MRO) 
 Spacecraft:  Mars Reconnaissance Orbiter (MRO)
 Instrument:  HiRISE 
 Product Size:  2880 x 1800 pixels (w x h) 
 Produced By:  University of Arizona/HiRISE-LPL 
 Other  
Information: 		 Other products from ESP_076140_1420 
 Full-Res TIFF:  PIA25707.tif (15.56 MB)
 Full-Res JPEG:  PIA25707.jpg (1.074 MB)  

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

Click here for larger image of PIA25707
Map Projected Browse Image
Click on image for larger version

Harmakhis Vallis is an approximately 800-kilometer long outflow channel located in eastern Hellas. The valley probably formed by a combination of surface collapse and flowing water.

The edges of Harmakhis Vallis were enlarged by material slumping off the walls, and it was later filled with ice-rich material, similar to glaciers on Earth. This image shows part of the valley floor that filled with glacial ice. Can you see the parallel ridges on some of the glaciers that show how the ice flowed downhill, around and between obstacles?

The map is projected here at a scale of 25 centimeters (9.8 inches) per pixel. (The original image scale is 25.7 centimeters [10.1 inches] per pixel [with 1 x 1 binning]; objects on the order of 77 centimeters [30.3 inches] across are resolved.) North is up.

This is a stereo pair with ESP_076140_1420.

The University of Arizona, in Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., in Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.

Image Credit:
NASA/JPL-Caltech/University of Arizona

Image Addition Date:
2023-01-31