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Exploring with Mars Reconnaissance Orbiter

Terrain sample
Click for full image.

In my never-ending rummaging through the images released each month from the high resolution camera on Mars Reconnaissance Orbiter (MRO), I have sometimes been puzzled by the titles they choose for some photographs. For example, many pictures each month are simply titled “Terrain Sample.” The image to the right, cropped and reduced to post here, is one example, and its content adds to the mystery.

The photograph itself shows a generally featureless surface. Other than the scattering of small craters, there are only very slight topographical changes, the most obvious of which is the meandering ridge to the east of the largest crater.

I wondered why this picture was taken, and why it was given such a nondescript name. To find out, I emailed Veronica Bray at the University of Arizona. She had requested this image as part of her job as a targeting specialist for MRO. Her answer:

1. Primarily, we are a mission of exploration! We have a lot of specified targets to image features of interest like craters, RSL, etc., but one of my favorite activities is getting new coverage! We do not know everything; we must explore!

2. As a spacecraft operations engineer I (we) are responsible for collecting images and for maintaining the good operational temperature of camera. Too high and we risk the instrument turning off to safe-guard the electronics, too low and the images will not be good quality. So, we sometimes add an image to boost our temperatures. As we are under the strict deadlines, these images are often quickest when we specify “terrain sample” rather than trying to find something specific and write a more lengthy science rationale.

Overview map

In other words, when Dr. Bray picked this location for photography, she really had no idea what was there. Almost no high resolution images have been taken nearby, as shown by the map to the right, with the red boxes indicating all the high resolution pictures taken by MRO. This image is indicated by the tiny blue dot near the bottom center. As you can see, it is all by its lonesome, making this image the first close-up ever taken of this area, and thus gives us a peek at something no one has ever seen before. To reiterate what Dr. Bray wrote, “We must explore!”

At the same time, this image was taken as much for engineering purposes than for scientific reasons. Apparently to keep the spacecraft functioning properly they must regularly take pictures, even when there are no requests for images. So they do so, and give those engineering images a simple name like “Terrain Sample” because the image was not taken for any specific scientific reason.

As to the geology in this image, Dr. Bray added that she quite rightly cannot comment, based on the image itself. Not enough information. I however can make my own speculations, as I usually do, recognizing as always that my guesses should be taken with a very large grain of salt.

First of all, this location is in the Cereberus Plains, one of the largest regions that is part of the transition zone between southern highlands and the northern lowlands, and nestled between the giant volcanoes Elysium Mons to the north and Olympus Mons to the east. Though these volcanoes are not particularly close, they are large enough and close enough for me to wonder if they may have laid down some volcano flows at this location.

Moreover, the picture itself appears to have a few ghost dunes, features that are formed when lava flows around a dune that eventually blows away, leaving behind the dune footprint.

None of this proves that this is a volcanic surface. A good geologist might tell me I don’t know what I’m talking about. However, as a preliminary theory it is a good place to start, though as with all theories it should be tossed out as soon as the data says so.


Conscious Choice cover

Now available in hardback and paperback as well as ebook!


From the press release: In this ground-breaking new history of early America, historian Robert Zimmerman not only exposes the lie behind The New York Times 1619 Project that falsely claims slavery is central to the history of the United States, he also provides profound lessons about the nature of human societies, lessons important for Americans today as well as for all future settlers on Mars and elsewhere in space.

Conscious Choice: The origins of slavery in America and why it matters today and for our future in outer space, is a riveting page-turning story that documents how slavery slowly became pervasive in the southern British colonies of North America, colonies founded by a people and culture that not only did not allow slavery but in every way were hostile to the practice.  
Conscious Choice does more however. In telling the tragic history of the Virginia colony and the rise of slavery there, Zimmerman lays out the proper path for creating healthy societies in places like the Moon and Mars.


“Zimmerman’s ground-breaking history provides every future generation the basic framework for establishing new societies on other worlds. We would be wise to heed what he says.” —Robert Zubrin, founder of founder of the Mars Society.


All editions are available at Amazon, Barnes & Noble, and all book vendors, with the ebook priced at $5.99 before discount. The ebook can also be purchased direct from my ebook publisher, ebookit, in which case you don't support the big tech companies and I get a bigger cut much sooner.


Autographed printed copies are also available at discount directly from me (hardback $24.95; paperback $14.95; Shipping cost for either: $5.00). Just email me at zimmerman @ nasw dot org.

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