From Newsgroup: sci.space.news
MARS RECONNAISSANCE ORBITER HIRISE IMAGES
January 27, 2016
o Pit Crater near Elysium Mons
http://hirise.lpl.arizona.edu/ESP_043222_2035
Pit craters are simply sink holes in the ground with near vertical
walls and floors that are only visible when the sun is high in the sky.
o A Tale of Two Flows.
http://hirise.lpl.arizona.edu/ESP_043609_2230
We will need to study this image in more detail to understand how these
flows have interacted with each other and what they can tell us about their composition.
o The Changing Sands.
http://hirise.lpl.arizona.edu/ESP_043617_1885
These barchan dunes have been imaged at least five times already, and each time, a
bit more movement is revealed.
o Jarosite in Noctis Labyrinthus.
http://hirise.lpl.arizona.edu/ESP_043719_1725
The jarosite-bearing deposit observed here could indicate acidic aqueous conditions
within a volcanic system in Noctis Labyrinthus.
All of the HiRISE images are archived here:
http://hirise.lpl.arizona.edu/
Information about the Mars Reconnaissance Orbiter is
online at
http://www.nasa.gov/mro. The mission is
managed by NASA's Jet Propulsion Laboratory, a division
of the California Institute of Technology, for the NASA
Science Mission Directorate, Washington, D.C. Lockheed
Martin Space Systems, of Denver, is the prime contractor
and built the spacecraft. HiRISE is operated by the
University of Arizona. Ball Aerospace and Technologies
Corp., of Boulder, Colo., built the HiRISE instrument.
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