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Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 

The print edition can be purchased at Amazon. from any other book seller, or direct from my ebook publisher, ebookit. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.


The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
 

"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News


Update on InSight’s mole: It is now underground

InSight's mole now completely buried
Click for full image.

An update today on the mole digging tool on the Mars lander InSight has revealed that the mole appears to finally be completely buried, though it remains unclear whether its most recent digging effort had succeeded in digging downward.

We found that during the first two rounds of hammering and during the first half of the third round of hammering, the scoop went further into the sand. Since the Mole was hidden under the scoop, the penetration of the probe itself could not be observed directly.

During the hammering, the flat tether running to the probe moved considerably, but these could only be clearly identified as forward movements during the hammering on 22 August. Overall, we could estimate from the movements of the scoop that the Mole moved at most one centimetre further into the ground. It was interesting to observe that during the second half of the round of 250 hammer blows on 19 September, the scoop did not go any further, probably because it encountered duricrust. This was certainly a desired outcome, as it allowed a second Free Mole Test to be conducted. In fact, the probe continued to move according to the movements of the tether, but it could not be clearly determined that these movements brought the Mole deeper into the ground.

The image shows InSight’s arm above the filled hole, with the mole’s flat tether coming out of the ground.

They are now going to fill the hole more, and then press down with the scoop during later drilling efforts to see if this allows the mole to proceed downward. If it fails I’m not sure if there is anything else they will be able to do to get the mole to work.

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9 comments

  • Hindsight, there could have been measurement markings on the tether.

  • pzatchok

    I make those type of “cables”.

    We could have easily placed them on if asked to.

    Plus that is exactly the wrong application for that material.

  • Lee Stevenson

    @pzatchok, it looks to me like the flat cables which connect the keyboard to the motherboard in my laptop?
    Surely a round cable , perhaps even with a teflon or similar smooth coating would be more suitable?… I’m only an armchair scientist… But that cable just looks wrong!

  • LocalFluff

    @Charles
    Yeah! Curiosity’s wheels leaving marks in the sand might seem a bit silly, but such things can come in handy. Not that there’s much more to do now other than to keep on hammering. Or perhaps dig up a high pile of sand ontop of it, hooping for some extra pressure?

  • pzatchok

    They might have went with one flat cable to reduce signal to noise ratio for the sensors but I can not see that being a real problem.

    And yes a standard round cable would have been better.

    They might have thought a round cable might have bound up on the reel and a flat one would not.

    But the insulation on those flat cables is very thin and the junction between the cable and circuit board is fragile.

  • Edward

    Lee Stevenson and pzatchok,
    They may have chosen a ribbon cable for greater flexibility than they could get with a round one.

  • pzatchok

    They are not that flexible.

    They bend great along one axis only.

  • Edward

    pzatchok,
    They are extremely flexible in that axis. This flexibility is one reason why I used them in a couple of my designs.

  • pzatchok

    I work for the Aerospace and Defense division of this company.
    https://www.ttmtech.com/

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