# PIA20736 Glowing Gullies in Kaiser Crater Dunes

- By: NASA/JPL-Caltech/Univ. of Arizona
- Date: (published)
- Classification: Photograph
- Credit line: Catalog page
- Museum: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:PIA20736_Glowing_Gullies_in_Kaiser_Crater_Dunes.jpg)
- Rights: Public domain
- Picture: https://upload.wikimedia.org/wikipedia/commons/thumb/4/48/PIA20736_Glowing_Gullies_in_Kaiser_Crater_Dunes.jpg/1920px-PIA20736_Glowing_Gullies_in_Kaiser_Crater_Dunes.jpg
- Who can see it: Teens profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)

The giant sand dunes in Mars's Kaiser Crater experience gully erosion of the steep slip faces every year in late winter as the sun warms these slopes and seasonal carbon dioxide frost sublimates (meaning it changes from a solid to gas).

Some of these gullies produce a variety of colors that are highlighted on the west-facing (illuminated) slopes, where the gullies appear to be glowing in the winter light.

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