8/28/2003: Mars "fingerprint"

Undertoad · 08-28-2003, 11:29 AM

The Astro pic of the Day for August 15th. With all the Mars news this week, this was probably the most compelling of all the images that were offered by various folks. Partly because it's fairly recent, from June of this year.

The crater, on the Mars surface, is 2.3 km (1.4 mi.) wide. It's visually confusing, but the layers of sediment that make up the "swirls" are highest in the MIDDLE of the crater.

The work of figuring out how those layers came to be is left as an exercise for the reader.

Hubris Boy · 08-28-2003, 01:06 PM

Mmmm... crop circles?

99 44/100% pure · 08-28-2003, 02:00 PM

Bullshit eruption.

LUVBUGZ · 08-28-2003, 02:38 PM

Big Mars zit ready to explode

xoxoxoBruce · 08-28-2003, 05:55 PM

Hmmm...so it's an innie and an outie?

Cool, UT. You get the best.

bjlhct · 08-29-2003, 12:01 AM

I think it's this: At that kind of velocity, solids act like liquids. And you know how when you drop water into more water, there is a raised thing in the middle? Basically in the center the forces are all in and it goes up because it's moving in and on the outside things are moving out (and still a little down) and everything gets pushed out with them. And that's enough physics for me today.

Chewbaccus · 08-29-2003, 12:16 AM

This is from the Huron King underground nuclear test in 1980. I can't make out anything about ridges, but when I saw that they were the highest in the center of crater, that got me thinking explosion, something pushing up starting at the center and decreasing as it moves outward, and well...

chrisinhouston · 08-29-2003, 08:41 AM

Have you ever seen a picture of a raindrop hitting a pool of water? For a split second as the drop hits there is a brief upward splash from the surface of the water just as a circular ripple starts to form Perhaps the suface was once very wet or muddy and it rained hard, I mean really hard!

Have to go now, nurse says I need to take my medicine.

russotto · 08-29-2003, 10:34 AM

How about elastic rebound? The theory: Whatever hit forced the surface layers of rock down, plasticizing them as well. They essentially BOUNCED back up, cooling the whole time, and solidified too much to drop back to level or below.

xoxoxoBruce · 08-29-2003, 06:08 PM

But Honey, I did put the seat up. Haven't you ever heard of elastic rebound?

plthijinx · 08-31-2003, 08:50 PM

Quote:

Originally posted by LUVBUGZ
Big Mars zit ready to explode

hey bugz, isn't that NBN's zit?

LUVBUGZ · 09-01-2003, 01:02 AM

Quote:

Originally posted by plthijinx
hey bugz, isn't that NBN's zit?

Yea, UT lied to us. This isn't Mars, it's NBN's forehead zit. Image provided by an electron microscope.
:p

plthijinx · 09-01-2003, 08:32 PM

Quote:

Originally posted by LUVBUGZ

Yea, UT lied to us. This isn't Mars, it's NBN's forehead zit. Image provided by an electron microscope.
:p

yeah!:p i'll go get the drilling equip. then our high gas prices are over

chrisinhouston · 09-02-2003, 09:42 AM

If you zoom the Hubble cameras in real close on the wall of the crater you can see amazing detail!

xoxoxoBruce · 09-02-2003, 04:21 PM

Hmmmm....NBN......plthijinx......chrisinhouston.....must be something in the water.

08-28-2003, 11:29 AM	#1
Undertoad Radical Centrist Join Date: Jan 2001 Location: Cottage of Prussia Posts: 31,423	8/28/2003: Mars "fingerprint" The Astro pic of the Day for August 15th. With all the Mars news this week, this was probably the most compelling of all the images that were offered by various folks. Partly because it's fairly recent, from June of this year. The crater, on the Mars surface, is 2.3 km (1.4 mi.) wide. It's visually confusing, but the layers of sediment that make up the "swirls" are highest in the MIDDLE of the crater. The work of figuring out how those layers came to be is left as an exercise for the reader.

08-28-2003, 02:00 PM	#3
99 44/100% pure Infrequently Astonished Join Date: Dec 2002 Location: Baltimore metro area Posts: 324	Bullshit eruption. __________________ Overcompensating for the 0.56% that is irredeemably corrupted.

08-28-2003, 02:38 PM	#4
LUVBUGZ Not aging gracefully. Join Date: Aug 2003 Posts: 530	Big Mars zit ready to explode __________________ You can't catch me...don't even try...go do something else...see ya next year. Mama Loves You Baby Girl ~ May You Rest In Peace

08-28-2003, 05:55 PM	#5
xoxoxoBruce The future is unwritten Join Date: Oct 2002 Posts: 71,105	Hmmm...so it's an innie and an outie? Cool, UT. You get the best. __________________ The descent of man ~ Nixon, Friedman, Reagan, Trump.

08-29-2003, 12:01 AM	#6
bjlhct Theremin Master Join Date: Mar 2003 Posts: 73	High in middle. I think it's this: At that kind of velocity, solids act like liquids. And you know how when you drop water into more water, there is a raised thing in the middle? Basically in the center the forces are all in and it goes up because it's moving in and on the outside things are moving out (and still a little down) and everything gets pushed out with them. And that's enough physics for me today.

08-28-2003, 01:06 PM	#2
Hubris Boy Keymaster of Gozer Join Date: Jul 2001 Location: Patapsco Drainage Basin Posts: 471	Mmmm... crop circles?

08-29-2003, 12:16 AM	#7
Chewbaccus Freethinker/booter Join Date: Jan 2001 Posts: 523	This is from the Huron King underground nuclear test in 1980. I can't make out anything about ridges, but when I saw that they were the highest in the center of crater, that got me thinking explosion, something pushing up starting at the center and decreasing as it moves outward, and well... __________________ Like the wise man said: Of course, that's just my opinion. I could be wrong.

08-29-2003, 08:41 AM	#8
chrisinhouston Professor Join Date: Sep 2001 Location: Houston TX Posts: 1,857	Raindrops keep falling on my head Have you ever seen a picture of a raindrop hitting a pool of water? For a split second as the drop hits there is a brief upward splash from the surface of the water just as a circular ripple starts to form Perhaps the suface was once very wet or muddy and it rained hard, I mean really hard! Have to go now, nurse says I need to take my medicine. Attached Images

08-29-2003, 10:34 AM	#9
russotto Professor Join Date: Jan 2001 Posts: 1,788	How about elastic rebound? The theory: Whatever hit forced the surface layers of rock down, plasticizing them as well. They essentially BOUNCED back up, cooling the whole time, and solidified too much to drop back to level or below.

08-29-2003, 06:08 PM	#10
xoxoxoBruce The future is unwritten Join Date: Oct 2002 Posts: 71,105	But Honey, I did put the seat up. Haven't you ever heard of elastic rebound? __________________ The descent of man ~ Nixon, Friedman, Reagan, Trump.

09-02-2003, 09:42 AM	#14
chrisinhouston Professor Join Date: Sep 2001 Location: Houston TX Posts: 1,857	If you zoom the Hubble cameras in real close on the wall of the crater you can see amazing detail! Attached Images

09-02-2003, 04:21 PM	#15
xoxoxoBruce The future is unwritten Join Date: Oct 2002 Posts: 71,105	Hmmmm....NBN......plthijinx......chrisinhouston.....must be something in the water. __________________ The descent of man ~ Nixon, Friedman, Reagan, Trump.

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