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#Mars

31 posts23 participants8 posts today
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... and then drive off the polar cap to meet up with a pre-landed return vehicle. These missions are not like Apollo, they are on a very different scale. The HEM-SAG report did not cover this but Jim Garvin had a poster at LPSC in 2008 with details reproduced in my map. During the drive south, more geophysics stations could be set up. The light-toned area should be white but my fake colour scheme doesn't know that. Tomorrow we'll look at our last HEM-SAG site.
#maps #mars #HEM-SAG

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HEM-SAG also wanted to look at climate history by drilling into a polar cap to study layers of ice and dust. This brought unique problems. The other 3 HEM-SAG missions would spend 500 days on Mars, but with the poles only sunlit for half a year you would have to either land or depart in darkness. Except - remember Wernher von Braun's Mars Project? Land on the pole, then drive off it. This new mission would land in daylight, do a deep drill and other studies for 220 sols ...
#mars #HEM-SAG

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These three sites - old, middle and young, Jezero, Arsia and Mangala, would be the first three sites visited by crews on Mars. They made up the reference mission sequence which would be the first phase of human exploration of Mars. I have been showing 'missions which didn't happen' but we should really call this set 'missions which haven't happened yet'. Will actual human missions go to these places? We don't know, but they are not Musk colony sites.
#mars #HEM-SAG

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I have to correct myself - the Mangala Valles sites was in the youngest period of Mars history, the Amazonian. I have edited yesterday's post but wanted o point it out here. The middle period of Mars history, the Hesperian, was studied at Arsia Mons in Tharsis, seen here. The landing site is west of the mountain in an area of lava lows and glacial deposits. One study suggested they might be carbon dioxide glaciers.
#maps #mars #HEM-SAG

Over 2,000 senior staff set to leave #NASA under agency push
The losses could endanger the administration’s plans for landing astronauts on the #moon and #Mars.
The 2,145 employees are those in #GS13 to #GS15 positions — senior-level government ranks that are typically reserved for those with specialized skills or management responsibilities. The losses are particularly concentrated at higher levels, with 875 GS-15 employees set to leave, according to the documents.
politico.com/news/2025/07/09/n

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The Jezero site sampled the oldest terrain on Mars, Noachian rocks on the rim of the Isidis impact basin. Today we look at a plan for the HEM-SAG site in Mangala Valles, from the younger (Amazonian) part of the history of Mars. The landing site is on the floor of a large channel formed when water flooded out of a fracture and flowed north into the plains west of Tharsis. One of the long traverses runs south into the source depression.
#maps #mars #HEM-SAG

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Jim Head (Brown U.) and others developed detailed plans for several HEM-SAG sites. Here is a plan for Jezero, Perseverance's landing site (the rover is just outside the crater now). It was also considered for Curiosity. Long traverses from a central base would visit many interesting sites - lava flows, channels, deltas etc., and set out geophysical stations to make a regional network in this ancient terrain.
#maps #mars #HEM-SAG