MOC Continued

REB · 2005-03-07 08:43:24

Thank you Cindy for the heads-up.

Palomar · 2005-03-15 13:28:22

*My pleasure, Robert. IMO the person who starts the 1st of any thread should have dibs on starting the 2nd one, if indeed it goes into a 2nd thread. :up:

http://www.spaceref.com/news/viewsr.html?pid=15778]Eos Chasma Mensa

Looks like the back (shell) of certain types of tortoises. :;):

--Cindy

REB · 2005-03-18 09:15:23

http://www.msss.com/moc_gallery/r10_r15 … html]Weird features in Elysium

I was hunting for this frozen sea in Elysium when I came across that picture.

BTW, have they released the location of this frozen sea in Elysium? It is supposed to be near the equator.

Palomar · 2005-03-18 13:38:48

http://www.spaceref.com/news/viewsr.htm … 5841]Frost on Dunes

*Strange photo. Nice, though. On a crater floor in southern Spring. Frost is on southward-facing slopes.

--Cindy

REB · 2005-03-24 08:09:47

White frost on Mars red surface reminds me of icing on a cake.

---------------------

I was digging around Elysium looking for that frozen see. Could it be in http://www.msss.com/moc_gallery/r10_r15 … .html]this area?

REB · 2005-03-24 08:14:40

Not far to the north from that last picture is http://www.msss.com/moc_gallery/r10_r15 … .html]this area.

Notice the somewhat streamlined crater. It looks almost like is received a blast from one direction.

Palomar · 2005-03-24 11:44:26

http://www.spaceref.com/news/viewsr.htm … ]Becquerel Dunes & Layers

*My first thought: Oooooooo!

Looks like a multi-fortressed fantasy land.

--Cindy

Shaun Barrett · 2005-03-24 20:46:09

Reb, that picture screams "Water!! at me. And plenty of it, too - massive water erosion.

Cindy, those layers are almost surreal! It's hard to imagine how such fine and exquisitely intricate layering could have come to be. Unbelievable. ???

Palomar · 2005-03-25 09:55:29

Cindy, those layers are almost surreal! It's hard to imagine how such fine and exquisitely intricate layering could have come to be. Unbelievable. ???

*Hi Shaun. Yeah, really. Looks like the garrison walls of a fairy world or something. But yet so delicate in appearance.

http://www.spaceref.com/news/viewsr.html?pid=15921]Lots of variety in this pic

Those dunes have a bit of that Arabic script appearance, then there's the smooth and slightly grooved strip towards the bottom which reminds me of a country road in the dead of winter.

I'd like to see a BIG version of that photo.

--Cindy

Palomar · 2005-03-25 21:37:40

http://www.spaceref.com/news/viewsr.html?pid=15854]5 km crater

*Uh-oh...another dome-like "optical illusion."

They compare it to the famous AZ Meteor Crater of only 1 km diameter.

--Cindy

Palomar · 2005-03-26 22:23:04

http://www.spaceref.com/news/viewsr.htm … 5946]Nifty Herschel Dunes

*I'll bet they're made out of chocolate. :;):

A webwork of sand dunes.

They resemble those Federation badges on the original Star Trek crewmembers' shirts.

Enough of the Rorschach.

Always enjoy pics of those dunes especially. The background has a very subtle mottled appearance to me.

--Cindy

REB · 2005-03-28 07:46:37

Cindy, at first glance at that dune picture was a school of fish swimming upstream.

Palomar · 2005-03-28 08:02:01

*Yep, I can "see" that...now that you mention it, Robert.

http://www.spaceref.com/news/viewsr.htm … ]Snowplows have been out again!

(And what else does that photo remind me of...?) :;):

--Cindy

Palomar · 2005-04-08 07:35:47

http://www.spaceref.com/news/viewsr.html?pid=16085]Erg

*That's apparently the Arabic word for "dune field." The pic is from the northern polar region and is a sand sea.

Our topic for the weeks of April 4 and April 11 is dunes on Mars. We will look at the north polar sand sea and at isolated dune fields at lower latitudes.

Looks like mottling and quite a bit of streaking in there, too. And is that roundish patch of brightness towards the center perhaps a partially/mostly buried crater?

--Cindy

::EDIT:: Just now found a new image at space.com:

http://www.space.com/imageoftheday/imag … 8.html]New global shot of Mars

Excellent. :up: Was released this week. "Shows the Tharsis face of Mars during autumn in the northern hemisphere and spring in the south."

Palomar · 2005-04-10 07:45:47

http://www.spaceref.com/news/viewsr.htm … 02]Martian fingerprints

*Nice photo, lots of variety. From northern plains region.

That wind streak is especially pronounced and perfectly "sharp." Seems the point of yet another wind streak is captured immediately above it, and just barely.

--Cindy

Palomar · 2005-04-11 10:45:53

http://www.spaceref.com/news/viewsr.htm … 6110]North Polar Dunes

*Gorgeous. Such a weird interplay between light and shadow. Apparently the dominant winds have been blowing from the upper right. Season is northern summer.

--Cindy

::EDIT:: http://www.spaceref.com/news/viewsr.htm … ]Ouroboros on Mars?

Very pronounced crater's rim looks like that old symbol.

Palomar · 2005-04-22 07:07:47

http://antwrp.gsfc.nasa.gov/apod/ap030626.html]Martian Analemma

*Didn't want to create a new thread for this and decided to post it here (hope you don't mind, REB). The analemma from Earth has an 8-shape. On Mars it'd appear as pear-shaped. Cool.

Is a digital illustration.

Good info in the caption.

--Cindy

Palomar · 2005-04-28 06:51:34

http://www.spaceref.com/news/viewsr.htm … 78]Islands in Kasei Vallis (THEMIS)

*Those "teardrop"-shaped formations are intriguing. Glacial vs liquid flow--

One theory is that this was a one-time catastropic event, another theory speculates that several flooding events occurred over a long time period. Others have proposed that some of the landforms (especially scour marks and teardrop shaped "islands") are the result of glacial flow rather than liquid flow. Teardrop shaped islands are common in terrestrial rivers, where the water is eroding material in the channel. A glacial feature called a *drumlin* has the exact same shape, but is formed by deposition beneath continental glaciers.

The upper portion of this VIS image contains several teardrop shaped "islands". If water cut these islands or if glaciers deposited them, the thin tail points in the direction of flow.

The remainder of the pic is ho-hum, but those "teardrops" caught my eye.

--Cindy

Palomar · 2005-05-02 06:53:29

http://www.spaceref.com/news/viewsr.htm … 6414]Large lava flow, Tharsis region

*So "grainy" in appearance, but of course that's a matter of perspective. I wonder how tall each of those "little" bumps are. What especially attracted my eye are what seems to be lines raking through the "grains", especially in the bottom half of that patch of lava flow. Wind streaking across the area perhaps? There do seem to be wind streaks on the smooth area of land in the upper right-hand corner of the pic.

--Cindy

Palomar · 2005-05-05 12:01:31

http://antwrp.gsfc.nasa.gov/apod/ap030221.html]Snow and gullies

*"Old" photo I don't recall having seen before. Am fishing around in Astropix, have snagged a few. North is up in the photo. I wonder how deep the snow is. Area is approximately 16 km wide.

Patches of smooth snow pack remain along the northern crater wall, while structures resembling the famous Martian gullies appear to be emerging as the snow cover gradually disappears, and are exposed along the crater's western (left) wall. Melting snow, running underneath the snow pack and down the crater walls would be protected from the extreme surface conditions, remaining liquid and eroding the gullies over time.

-*-

http://antwrp.gsfc.nasa.gov/apod/ap990816.html]From 1999: Mars Weather Watch

I've not seen this collection (4 of them!) of photos before. What a curl! Amazing. Extreme northern Mars. Says similar storms were observed in the region, during July and August -- "revealing surprisingly complex weather." That's one of the best weather-related series of photos from Mars, IMO.

--Cindy

::EDIT:: http://antwrp.gsfc.nasa.gov/apod/ap021224.html]Yet another: Spring Dust Storms @ Mars NP

Excellent photo. Such detail.

As the north polar cap begins to thaw, a temperature difference occurs between the cold frost region and recently thawed surface, resulting in swirling winds between the adjacent regions...The choppy clouds of at least three dust storms can be identified.

Shaun Barrett · 2005-05-05 23:31:06

Excellent pictures! :up:
The Martian Analemma was fascinating. A spearhead Analemma, eh? Very suitable for the god of war. :;):
Loved the last dust storm picture. I can just imagine how much more dynamic the climate system will be on Mars when we start raising the atmospheric density.

Palomar · 2005-05-07 04:38:12

http://www.spaceref.com/news/viewsr.htm … 523]Stokes Crater Dunes

*Beautiful dark dunes of the northern Marsian plains. Sand transport indicates winds are from the north/northeast. Interesting contrast of darker and lighter areas.

--Cindy

Rxke · 2005-05-07 09:14:18

http://www.spaceref.com/news/viewsr.html?pid=16085]Erg
*That's apparently the Arabic word for "dune field."

One can easily tell that Cindy, besides having not read KSR's Mars trilogy, she has neither read Frank Herbert's Dune saga. Tsk tsk tsk....

Palomar · 2005-05-07 09:18:41

http://www.spaceref.com/news/viewsr.html?pid=16085]Erg
*That's apparently the Arabic word for "dune field."
One can easily tell that Cindy, besides having not read KSR's Mars trilogy, she has neither read Frank Herbert's Dune saga. Tsk tsk tsk....

*Au contraire: I've read the first 2 books of the Dune saga.

I just didn't remember that word.

--Cindy

REB · 2005-05-16 07:29:02

http://antwrp.gsfc.nasa.gov/apod/ap990816.html]From 1999: Mars Weather Watch
I've not seen this collection (4 of them!) of photos before. What a curl! Amazing. Extreme northern Mars. Says similar storms were observed in the region, during July and August -- "revealing surprisingly complex weather." That's one of the best weather-related series of photos from Mars, IMO.
--Cindy
::EDIT:: http://antwrp.gsfc.nasa.gov/apod/ap021224.html]Yet another: Spring Dust Storms @ Mars NP
Excellent photo. Such detail.
As the north polar cap begins to thaw, a temperature difference occurs between the cold frost region and recently thawed surface, resulting in swirling winds between the adjacent regions...The choppy clouds of at least three dust storms can be identified.

http://www.exploringmars.com/science/cyclone.html]DO you remember seeing this storm on Mars?

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#1 2005-03-07 08:43:24

Re: MOC Continued

#2 2005-03-15 13:28:22

Re: MOC Continued

#3 2005-03-18 09:15:23

Re: MOC Continued

#4 2005-03-18 13:38:48

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#5 2005-03-24 08:09:47

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#6 2005-03-24 08:14:40

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#7 2005-03-24 11:44:26

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#8 2005-03-24 20:46:09

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#9 2005-03-25 09:55:29

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#10 2005-03-25 21:37:40

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#11 2005-03-26 22:23:04

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#12 2005-03-28 07:46:37

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#13 2005-03-28 08:02:01

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#14 2005-04-08 07:35:47

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#15 2005-04-10 07:45:47

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#16 2005-04-11 10:45:53

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#17 2005-04-22 07:07:47

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#18 2005-04-28 06:51:34

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#19 2005-05-02 06:53:29

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#20 2005-05-05 12:01:31

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#21 2005-05-05 23:31:06

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