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Posted by baalke on October 23, 2006, 12:01 pm
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http://www.esa.int/esaSC/SEMINCO7BTE_index_0.html
Cydonia's 'Face on Mars' in 3D animation
European Space Agency
23 October 2006
Recently, ESA's Mars Express delivered photos of the famous 'Face on
Mars' in the Cydonia region. The High Resolution Stereo Camera images
are some of the most spectacular views of the Red Planet ever taken.
Now, there's a stunning 3D animation of the area.
The High Resolution Stereo Camera (HRSC) science team have produced a
dramatic 3D animation that beautifully simulates a flight over the
Cydonia 'Face on Mars', one of the most famous surface features on the
planet.
The movie sequence was produced through a combination of digital data
from the HRSC and the Mars Orbiter Camera (MOC) on board NASA's Mars
Global Surveyor, in a technique similar to that used to create the
Cydonia 'Face' 3D still images published on the ESA portal in
September.
The 3D animation starts looking towards the East, and finishes with a
still image looking South.
The Cydonia region lies at approximately 40.75?? North and
350.54?? East,
and is located in the Arabia Terra region on Mars, in the transition
zone between the Southern Highlands and the planet's northern plains.
The famous 'face' - actually a remnant massif - was first observed in a
photo taken on 25 July 1976 by the American Viking 1 orbiter. Shortly
afterwards, a NASA press release said the formation "resembles a human
head." At the time, NASA scientists had already correctly interpreted
the image as an optical illusion caused by the illumination angle of
the
Sun, the formation's surface morphology and the resulting shadows,
giving the impression of eyes, nose and mouth. The new HRSC images
confirm again the natural origin of this geological feature.
Note to editors
The HRSC science team is led by Principal Investigator Prof. Dr Gerhard
Neukum. The team consists of 45 co-investigators from 32 institutions
and 10 nations. The systematic processing of the HRSC image data is
carried out by the German Aerospace Centre (DLR), while the images
shown
here were processed by the PI group at the Institute for Geosciences,
Freie Universitaet (Free University), Berlin, in cooperation with DLR's
Institute of Planetary Research, Berlin.
For more information
Agustin Chicarro, ESA Mars Express Project Scientist, The Netherlands
Email: agustin.chicarro @ esa.int
Gerhard Neukum, HRSC Principal Investigator, Freie Universitaet,
Berlin,
Germany
Email: gneukum @ zedat.fu-berlin.de
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Posted by marsfossils on October 23, 2006, 4:36 pm
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> Cydonia's 'Face on Mars' in 3D animation
> http://www.esa.int/esaSC/SEMINCO7BTE_index_0.html
> European Space Agency
I am not sure but I think that this animation uses an unrealistic
vertical exaggeration. Would anybody know and share with us the height
above the plane and the width of this feature?
It is a nice little show otherwise.
Best,
Michael
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Posted by Sorcerer on October 23, 2006, 9:00 pm
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|> Cydonia's 'Face on Mars' in 3D animation
| > http://www.esa.int/esaSC/SEMINCO7BTE_index_0.html
| > European Space Agency
|
| I am not sure but I think that this animation uses an unrealistic
| vertical exaggeration. Would anybody know and share with us the height
| above the plane and the width of this feature?
|
| It is a nice little show otherwise.
|
| Best,
|
| Michael
"The High Resolution Stereo Camera images are some of the most spectacular
views of the Red Planet ever taken. "
The scarp seems to be about 30 degrees or so, with considerable erosion.
This angle is typical of sand dunes and coal tips, even table salt if
you make a small pile on the kitchen counter-top.
The reason is that sine 30 degrees = 0.5, and so horizontal frictional
forces holding a rock in place is just balanced by vertical gravity
causing it to tumble.
Naturally this doesn't apply to cliffs, but with erosion a cliff face
will eventually become a 30 degree slope.
I do not see evidence of or reason to suspect vertical exaggeration
in the image.
Androcles
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