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Mysterious Appearing Mars Rock

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#76 Andy Taylor

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Posted 30 January 2014 - 03:49 AM

:looney:

#77 Qwickdraw

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Posted 30 January 2014 - 06:44 AM

The highest probabilities are :

1) volcanic rock

2) meteorite

3) wind uncovered a buried rock

Barring unknown mechanisms, it's simple : the rock was not there one day, and then it suddenly appeared. Only a small handful of known mechanisms could produce this result.

It doesn't look like any meteorite I have seen, so I tend to think #1 or #3 is most likely.


In my opinion
1 is not plausible as there are no known active volcanos on Mars.

2 is an option if there was an impact but a new crater should be able to be seen somewhere

3 is not plausible as prior photos would have revealed it covered.


The rover takes numerous photos of an area it is going to drive over. Careful consideration is given to almost every foot of travel. If the rock was kicked out by a wheel, a simple change of position and a few new photos of the immediate area should reveal this.

#78 PeterR280

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Posted 30 January 2014 - 10:12 AM

It's also a very strange looking rock, given the surroundings; color, shape, etc. Analysis will be interesting.

#79 rdandrea

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Posted 30 January 2014 - 11:39 AM

the mystery rock has made the courts :question: I guess he's not satisfied with waiting.


As Dr. Hunter S. Thompson once wrote, "When the going gets weird, the weird turn pro."

#80 Qwickdraw

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Posted 30 January 2014 - 11:54 AM

Ok, my theory if found not kicked up by a wheel is that it was tossed there from one of the many dust devils that are common on Mars.

#81 Qwickdraw

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Posted 30 January 2014 - 11:58 AM

I think that it has been thrown up by one of these...

Martian dust devils


oops Andy, I didn't see your post until after I made my prior post. I agree 100%.

Great minds think alike.
The problem is so do irrational minds.

#82 Andy Taylor

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Posted 30 January 2014 - 01:19 PM

Ok, my theory if found not kicked up by a wheel is that it was tossed there from one of the many dust devils that are common on Mars.


See my link on the previous page - most likely I think...

#83 Glassthrower

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Posted 30 January 2014 - 02:12 PM

A meteorite will not always leave a crater or visible impact mark. Depending on the speed, angle of entry, size, shape, and composition of the meteor, the surviving fragment that impacts the surface of the planet may simply fall at terminal velocity and "gently" hit the ground. That is why the majority of small meteorites found on Earth are not associated with a crater or an impact pit.

However, Mars has a much thinner atmosphere, so the incoming meteor would not shed as much cosmic velocity during atmospheric entry. I would think that meteorites on Mars would retain more of their speed and transfer that velocity in the form of energy released during impact with the surface - hence, more craters, bigger craters, and more ejecta.

Given the lack of any visible ejecta, it is highly unlikely to be a meteorite. But, what else is it likely to be?

Best regards,

MikeG

#84 dyslexic nam

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Posted 30 January 2014 - 02:44 PM

Martian flowers sure are ugly.

#85 Les Aperture

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Posted 30 January 2014 - 04:56 PM

waiting for it to sublimate...

#86 rdandrea

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Posted 30 January 2014 - 04:56 PM

Given the lack of any visible ejecta, it is highly unlikely to be a meteorite. But, what else is it likely to be?



Ejecta from a distant meteorite impact. That's one of the working hypotheses. Not my favorite (I like the "rock dislodged by wheel" hypothesis), but still in play. The composition of the rock doesn't say "meteorite" to me.

#87 Rick Woods

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Posted 30 January 2014 - 07:14 PM

Martian cow pie.

#88 Glassthrower

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Posted 30 January 2014 - 08:10 PM

Ejecta from a distant meteorite impact. That's one of the working hypotheses. Not my favorite (I like the "rock dislodged by wheel" hypothesis), but still in play. The composition of the rock doesn't say "meteorite" to me.


I had not considered ejecta from a distant impact.

Agreed, it does not resemble a meteorite....but, some aubrites and enstatite meteorites have a white or pale matrix. Absent any fusion crust, they can look very odd. Look at pieces of the Norton County aubrite. Some pieces are pure white.

Ejecta could also be native Martian rock. Ejecta is a mix of target rock from the impact area and remnants of the impacting meteorite. We could be seeing a piece of Martian rock displaced by an unseen meteorite impact.

It is still unlikely, but given the lack of working theories, this is as good as some. :)

Best regards,

MikeG

#89 llanitedave

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Posted 31 January 2014 - 01:45 AM

I'm kind of leaning towards the ejecta from a somewhat distant impact myself. Not too distant, or it would have left a substantial crater. Not too close, or the composition wouldn't be so unusual for the immediate vicinity.

I'd really be scanning the MRO output to see if there are any new craters a few tens of kilometers away from Endeavor crater.

#90 Mister T

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Posted 31 January 2014 - 09:30 PM

It's a marshroom

#91 Rick Woods

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Posted 01 February 2014 - 12:40 AM

It's a marshroom


Ahh, jeez, you're terrible! :lol:

#92 Mister T

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Posted 01 February 2014 - 09:59 PM

Thank You!

I'm here til Thursday

Try the veal...

#93 herrointment

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Posted 01 February 2014 - 11:31 PM

It's veally good!!!

#94 maugi88

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Posted 02 February 2014 - 10:02 AM

Oh boy! :ohmy:

#95 Khyron

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Posted 02 February 2014 - 12:05 PM

NASA is being sued over this...

Some red tape from the red planet — with NASA now facing a lawsuit over an alleged Martian rock that looks sort of like a jelly doughnut.

Earlier this week in a California court, astrobiologist Rhawn Joseph filed suit in an attempt to force the American space agency to examine a rock the Opportunity rover first photographed on Mars Jan. 8. (Via U.S. District Court)

His claim? It's alive.



http://www.ajc.com/n...-martian-roc...

#96 maugi88

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Posted 06 February 2014 - 01:45 PM

Did you see the article about the brand new impact site on mars? Maybe Dave was right and this is an impact ejecta. The headline states that in the past three years, so who knows.http://news.yahoo.com/pow-fresh-crater-mars-spotted-nasa-spacecraft-photo-114248945.html

#97 PeterR280

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Posted 06 February 2014 - 04:08 PM

Was the recently discovered Mars impact crater near the Rover?

#98 maugi88

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Posted 06 February 2014 - 05:18 PM

I don't know. The following is a excerpt from the article: The asteroid or comet that created the crater — which sits at 3.7 degrees north latitude and 53.4 degrees east longitude on Mars — ejected material as far as 9.3 miles (15 kilometers) away from the impact site, officials added

Where is Opportunity? It also stated that the impact was before May of 2012 so when was Opportunity parked? Wait, I guess it couldn't have been it. Opportunity was surely moving around in 2013. Sorry folks, I should have read the article before posting. Oops

I was so excited when I saw that headline I just posted it right away. I do apologize to all.

#99 dyslexic nam

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Posted 06 February 2014 - 05:22 PM

No worries. It's not like NASA has said anything lately, so we might as well speculate...

#100 Rick Woods

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Posted 06 February 2014 - 05:59 PM

I was so excited when I saw that headline I just posted it right away. I do apologize to all.


Yeah, you're the only person that's ever done that here! ;)






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