Click for full image.
Time for some cool images from Perseverance! The rover, now on Mars for more than a year, has finally begun its journey up the delta of material that some time in the past flowed through a gap in the rim of Jezero Crater. In doing so, it has also finally got close to a nearby cliff, within fifty feet or so, and used its high resolution left mast camera (mastcam) to take the photos to the right. The first, cropped and reduced to post here, was a wider shot taken on June 10, 2022, with the red arrow pointing to the part of the cliff featured in the second image below, taken on June 12, 2022, after the rover had moved in closer. This second photo is also cropped and reduced to post here.
Click for full image.
Click for interactive map.
As with the geology that Curiosity is seeing in Gale Crater, the number of layers is astonishing. From orbit the delta appears almost as if it was one event, a blob of mud and material pushed out catastrophically. Up close, it is quite evident that instead the delta was laid down over eons, with many events each placing down a new layer.
Those layers are so thin and many that if you look close, you can see that some thin sections have been eroded away between others, leaving gaps. This is very evident at the pointy end that extends outward the most. In several spots you can see through that pointy ends to the sky beyond.
Were the events that created these many thin layers seasonal, occurring each year when the atmosphere was thicker and the change of seasons had a greater impact? Or were they tied to longer term cycles, such as the changes in Mars’ rotational tilt or obliquity, which can vary from 11 to 60 degrees? Scientists today believe many of the geological features now identified on Mars were caused by the latter cycles.
It is Perseverance’s job to find out which, here in Jezero Crater. The overview map to the right provides some context. The yellow lines indicate the area covered by the wider photo above. Though the rover’s science team have not yet published their planned route up the delta, it seems very likely Perseverance will be sent up the gap that is presently to its right.
Ingenuity still sits on the crater floor, about a half a mile to the east. Its engineering team is still working to get its batteries charged as well as rewriting its flight software to deal with the failure of one sensor. If these fixes can be achieved, the plan is to fly the helicopter that half mile or so to the west so it is positioned at the entrance to the gap, thus providing good line of sight communications between it and the rover as Perseverance travels upward.
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.
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.