MOC Continued

Palomar · 2005-05-20 04:58:24

http://www.universetoday.com/am/publish … ?1952005]A true FIRST

*MGS snaps photos of both ME and MO as they co-orbit.

Photographs from NASA's Mars Global Surveyor spacecraft released today are the first pictures ever taken of a spacecraft orbiting a foreign planet by another spacecraft orbiting that planet.

--Cindy

P.S.:

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

Hi REB. Yep. I posted that photo (from Astropix) years ago ... shortly after registering here. Can't recall in which thread. It's a dilly of a photo, huh?

REB · 2005-05-20 06:44:25

That's cool. Mars orbital space is getting crowded LOL.

Palomar · 2005-05-20 10:18:30

That's cool. Mars orbital space is getting crowded LOL.

*Now there's a thought.

-*-

http://www.spaceref.com/news/viewsr.htm … 72]Gullied slope

shows gullies formed on an equator-facing slope among mounds in Acidalia Planitia.

The area behind (upper right-hand side of photo) it: Dark soil or shadowing within a depression?

--Cindy

REB · 2005-05-20 12:50:19

http://www.msss.com/moc_gallery/r16_r21 … html]First thing that came to mind when I saw this picture was E. Fudd saying "Wabbit Tracks!"

Shaun Barrett · 2005-05-22 04:35:29

Cindy:-

The area behind (upper right-hand side of photo) it: Dark soil or shadowing within a depression?

2005.05.20.S0400877.medium.jpg

I've often wondered whether some of the dark soil that seems to gather preferentially in low places might be brine-soaked or, in some cases, may actually be pools of brine on the surface.
In this case, judging by the light falling on the gullies themselves, I'd say the large dark area is just that - a large area of shadow.

Palomar · 2005-05-25 12:29:34

http://www.spaceref.com/news/viewsr.html?pid=16738]West of Elysium Mons volcano

*Hi Shaun: Regarding your latest post: Brine soaked or pools of brine...cool. But I agree with your last comment.

Nic pic. Trough region. And the ripples on the "floor." :up:

The walls look terribly steep. In the "watch your first step, it's a doozy!" sort of way. Teehee.

--Cindy

Palomar · 2005-05-28 12:18:29

http://antwrp.gsfc.nasa.gov/apod/ap990504.html]Banded magnetic field patterns

*Just now found this at Astropix.

Mapping Mars from orbit, instruments on the Mars Global Surveyor (MGS) spacecraft have recently revealed banded magnetic field patterns - a startling and unanticipated suggestion that the Red Planet was more Earth-like in its distant past. The red and blue regions within the MGS orbital tracks across this portion of southern Mars indicate adjacent areas of crust where magnetic fields point in opposite directions. The bands seem to run east-west and are about 100 miles wide and 600 miles long. Such patterns are known to be produced on Earth by plate tectonics.
As the crustal plates spread apart along the mid-ocean ridges, they carry a progressive banded record of Earth's changing magnetic field. The similar patterns on Mars are seen as evidence that it too once had moving crustal plates and a changing magnetic field, although both processes - still active on the larger planet Earth - are thought to have long since died away.

Perhaps a rehash of info already known, but my memory isn't keen on this point and will post it anyway.

--Cindy

::EDIT::

These high resolution measurements of martian magnetism were made possible by the revised, close aerobraking orbits of the MGS spacecraft and not originally planned.

Palomar · 2005-05-30 12:51:09

0oooo...thats]http://www.spaceref.com/news/viewsr.html?pid=16789]0oooo...that's groovy

*Get a load of that "tiny" ringlet of defrostation (is that a word?) to the right of the big depression. A fairy ring of defrosting dunes?? :;):

Is the south polar region. Circular depression might be the remains of an impact crater.

In summer, the spotted surfaces in this image would be darker than their surroundings, because they are patches of windblown sand.

-*-

http://www.spaceref.com/news/viewsr.html?pid=16790]East Candor Outcrops

Sort of reminds me of the Martian eroded hills (terraced/stepped) which look like the horned backs of a certain breed of tortoise.

--Cindy

Palomar · 2005-05-31 09:08:58

http://www.spaceref.com/news/viewsr.htm … 94]Whitish wind streaks in Syrtis Major

*Usually we see black or brownish-black wind streaks (I like those better, because they're so jagged in appearance -- sharp points).

Interesting effect, though.

--Cindy

REB · 2005-06-01 06:56:39

Lots of cool pictures, Cindy!

http://www.msss.com/moc_gallery/e19_r02 … html]Found some new pictures of that bizarre terrain in Hellas, near the lowest spot on Mars.

This one show some depth, thanks to the light angle.

http://www.msss.com/moc_gallery/e19_r02 … ml]Another here

http://www.msss.com/moc_gallery/e19_r02 … 3.html]And here

REB · 2005-06-01 07:04:05

http://www.msss.com/moc_gallery/e19_r02 … .html]Here is another one

http://www.msss.com/moc_gallery/e19_r02 … 5.html]And one last one

This is the most weird, strange and bizarre landscape I have seen on Mars.

I’ll remind folks that temperatures and pressures, at this location, sometime get where liquid water can exist at the surface. My gut feeling is that this might play a part in this landscape that looks like batter being mixed in a bowl.

Also remember, the is the floor of an impact basin that is 6 miles deep. Could be looking at twisted metamorphic rocks that were either formed from the impact? Could we be looking at metamorphic rocks that were 6 miles under ground until the impactor exposed them?

Or is it some muddy slurry slowly moving around the surface?

So many questions.

Palomar · 2005-06-01 07:06:52

This is the most weird, strange and bizarre landscape I have seen on Mars.

*Hi REB. I often think that myself. And then a week later something even more bizarre turns up. It's truly a fascinating planet, regardless of any future plans or expectations. "Simply" as a planet, Mars is quite a dilly.

--Cindy

REB · 2005-06-01 07:06:52

More thoughts on the weird Hellas area.

Maybe this area is some sort of muddy/icy slurry,, sort of like a slushy glacier. I do see features that look like glacier moraines. But what about the curly features. Could they be mud eddies?

Palomar · 2005-06-02 14:01:25

*Hi REB. Hellas might be weird, but it's got some really funky caves. Oh...ha ha ha...that's another thread. Nevermind.

-now back to our regularly scheduled programming-

http://www.spaceref.com/news/viewsr.htm … 6827]Platy flow material

Zephyria (I like that name) region.

The materials have impact craters in them, suggesting that they are composed of solid rock rather than ice. Some investigators have proposed that these materials are part of a vast ice-covered lake or sea, but the impact craters formed in the material suggest that it is not ice. Other investigators have cited evidence for an origin by very fluid lavas; some of the evidence includes small volcanoes scattered throughout the region.

It looks like a delicate filigree. Or lace. Definitely a pretty feature.

--Cindy

REB · 2005-06-03 06:48:16

Looks like a lava flow like I have seen on the Moon.

Palomar · 2005-06-03 10:15:50

http://www.spaceref.com/news/viewsr.html?pid=16832]MOC milestone: 200,000th picture

*Its first photo was taken on the 3rd MGS orbit on September 12, 1997. MOC has taken nearly four times the images obtained by Viking 1 & Viking 2, combined.

Article discusses MOC's 3-camera system.

The image (left, MOC2-1111a), showing details on the floor and in the ejecta blanket of a northern middle-latitude martian crater...

Data from the MGS MOC have contributed greatly over the past eight years to the on-going revolution in Mars science. As less than 5% of the martian surface has been covered by MOC's high resolution (narrow angle) camera system, one never knows from one day to the next whether a new discovery will be made.

Just less than 5%? ???

--Cindy

Palomar · 2005-06-08 10:25:59

http://www.spaceref.com/news/viewsr.html?pid=16880]Dust avalanches in Hebes Chasma

*Nifty. Aka slope streaks. Is a THEMIS image (Mars Odyssey). That curve within the slope sets the photo off.

Brief explanatory caption beneath.

--Cindy

P.S.: Can see many filled craters too; only the outlines of their rims remain.

Palomar · 2005-06-09 11:29:55

http://www.spaceref.com/news/viewsr.htm … 5]Daedalia Flow

*From Daedalia Planum region, south of Arsia Mons. This region is well known for an abundance of long and ancient lava flows.

Looks like a tissue sample of the human brain to me.

--Cindy

Palomar · 2005-06-09 20:22:28

http://www.spaceref.com/news/viewsr.html?pid=16880]Dust avalanches in Hebes Chasma
*Nifty. Aka slope streaks. Is a THEMIS image (Mars Odyssey). That curve within the slope sets the photo off.
Brief explanatory caption beneath.
--Cindy
P.S.: Can see many filled craters too; only the outlines of their rims remain.

http://www.spaceref.com/news/viewsr.html?pid=16927]More crater dust avalanches...

*...this time in Tikhonravov Crater. Is another MO/THEMIS image. I like these. :up:

--Cindy

Palomar · 2005-06-12 07:17:35

*Are they http://www.spaceref.com/news/viewsr.htm … 4]drifting in formation? ???

Is in western Arabia Terra. Are the cause of windstreak formations further downwind.

--Cindy

Palomar · 2005-06-13 16:57:29

http://www.spaceref.com/news/viewsr.htm … 6972]Arsia Mons: THEMIS image

*Looks nearly perfectly round, and the caldera surface seems very smooth.

Arsia Mons is the southernmost of the Tharsis volcanoes. It is 270 miles in diameter, almost 12 miles high, and the summit caldera is 72 miles wide.

-*-

http://www.spaceref.com/news/viewsr.htm … d-streaked plain

Is near Pavonis Mons volcano.

The lighter-toned surfaces show how the plain used to look, before strong winds removed much of a thin coating of dust.

I still wonder why the streaks are so jagged, though (and no matter -where- on Mars we find them)? Such finely pointed "tips." Always enjoy pics of wind streaks. :up:

--Cindy

Palomar · 2005-06-16 05:04:18

http://www.spaceref.com/news/viewsr.htm … 6972]Arsia Mons: THEMIS image
*Looks nearly perfectly round, and the caldera surface seems very smooth.

http://www.spaceref.com/news/viewsr.htm … 7]Close-up of caldera rim and floor

*Yep, they characterize the caldera surface as "very flat." Filled with lava. Looks like a frozen calm lake. THEMIS image. Mentions effects of eruptions and collapses after eruptions.

-*-

http://www.spaceref.com/news/viewsr.htm … 011]Valley of Olympica Fossae

Very rugged. Reminds me of tire treads in mud. They're speculating that lava, mud or water -- or a combination of any of those -- once flowed through this valley.

--Cindy

REB · 2005-06-16 11:16:20

http://www.msss.com/moc_gallery/e19_r02 … html]Check out this Image

The top section reminds me of Satellite pictures of a city’s suburbs.

REB · 2005-06-16 11:22:05

http://www.msss.com/moc_gallery/e19_r02 … html]These two of the same area are interesting.

Nice Dunes and possible Ice Tongue in the center. Nice channels towards the bottom.

Palomar · 2005-06-19 18:02:34

http://www.spaceref.com/news/viewsr.htm … 7059]Polka Dot Mars

*South polar region. Says dunes begin to defrost sooner than other Martian surfaces. And I'm going to pack a huge scrumptious lunch for the Million Year Picnic and watch the dunes defrost in person.

-*-

http://www.spaceref.com/news/viewsr.htm … 8]Southern hemisphere gullies

From the walls of an impact crater.

A liquid, laden with debris, poured down these slopes to form the gullies. Gully erosion cut through a thick mantle that covers the original crater wall, and then cut into the old wall itself. The source of the liquid might have been within the layered material exposed in the crater walls.

--Cindy

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#26 2005-05-20 04:58:24

Re: MOC Continued

#27 2005-05-20 06:44:25

Re: MOC Continued

#28 2005-05-20 10:18:30

Re: MOC Continued

#29 2005-05-20 12:50:19

Re: MOC Continued

#30 2005-05-22 04:35:29

Re: MOC Continued

#31 2005-05-25 12:29:34

Re: MOC Continued

#32 2005-05-28 12:18:29

Re: MOC Continued

#33 2005-05-30 12:51:09

Re: MOC Continued

#34 2005-05-31 09:08:58

Re: MOC Continued

#35 2005-06-01 06:56:39

Re: MOC Continued

#36 2005-06-01 07:04:05

Re: MOC Continued

#37 2005-06-01 07:06:52

Re: MOC Continued

#38 2005-06-01 07:06:52

Re: MOC Continued

#39 2005-06-02 14:01:25

Re: MOC Continued

#40 2005-06-03 06:48:16

Re: MOC Continued

#41 2005-06-03 10:15:50

Re: MOC Continued

#42 2005-06-08 10:25:59

Re: MOC Continued

#43 2005-06-09 11:29:55

Re: MOC Continued

#44 2005-06-09 20:22:28

Re: MOC Continued

#45 2005-06-12 07:17:35

Re: MOC Continued

#46 2005-06-13 16:57:29

Re: MOC Continued

#47 2005-06-16 05:04:18

Re: MOC Continued

#48 2005-06-16 11:16:20

Re: MOC Continued

#49 2005-06-16 11:22:05

Re: MOC Continued

#50 2005-06-19 18:02:34

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