Mystery of Mars 'doughnut rock' solved

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  • Member since
    November, 2009
Mystery of Mars 'doughnut rock' solved
Posted by Poppa Chris on Friday, February 14, 2014 4:06 PM

---Poppa Chris---

Denham Springs, Louisiana USA

"Second star to the right - Then straight on until morning!" - Peter Pan

Celestron CPC1100GPS (XLT) - 279mm aperature, 2800mm Focal length. (f10) Celestron Ultima LX (70deg AFOV) Eyepieces 32mm thru 5mm, Canon EOS Rebel T2i DSLR, Backyard EOS imaging software, Orion Star Shoot Planetary Imager IV, Celestron Skymaster 15x70 binoculars


  • Member since
    October, 2005
Posted by leo731 on Friday, February 14, 2014 5:47 PM

Here is another link;


Seems it was not as strange as many wished it to be.


A nebula in the eyepiece is worth two in the Atlas.

  • Member since
    July, 2001
  • From: PA, USA, Earth Moderator
Posted by DaveMitsky on Friday, February 14, 2014 8:42 PM

Keeping Occam's Razor in mind, I thought that the "mystery" would turn out to have a mundane explanation.

Dave Mitsky

Sic itur ad astra!

Chance favors the prepared mind.

A man is a small thing, and the night is very large and full of wonders.

  • Member since
    August, 2010
Posted by PeakOilBill on Friday, February 14, 2014 11:58 PM

The rocks have made numerous dents, and even punched a hole, in one of the aluminum wheels. That could cause wheel failure, if they continue to run over them. Somebody screwed up. I would have thought they would have been made out of some sort of titanium or beryllium alloy. Thin aluminum is weak. Seeing the holes reminded me of the time I found a stainless steel spoon on the playground in high school, and decided to bend it back and forth until it broke. I gave up after it got hot from the repeated bending. I couldn't believe any metal could be that fatigue resistant. Too bad it is a bit heavy to send to Mars. 


  • Member since
    October, 2007
Posted by Aratus on Thursday, March 06, 2014 12:40 PM

There is still the mystery of how the wheels imparted such impetus to the stone to move it so far.    I wonder if the wheels played a sort of game of 'tiddly-winks' with the stone rather than flicking it?


Location:  North West Devon, UK


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  • Member since
    October, 2005
Posted by leo731 on Thursday, March 06, 2014 1:53 PM

Maybe they burned rubber, um aluminum?  Smile, Wink & Grin

Maybe these weathered rocks are more frangible than we thought. 


A nebula in the eyepiece is worth two in the Atlas.

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