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View Full Version : Moon farside odd feature .



Don J
2012-Oct-13, 11:24 PM
This is the zoomed pic showing the odd feature
http://i1008.photobucket.com/albums/af201/feelfree222/tmp-1.png?t=1350156362

in the "rectangular" aera located near the top
http://i1008.photobucket.com/albums/af201/feelfree222/tmp-2.png?t=1350157678

source
http://www.nasa.gov/mission_pages/LRO/multimedia/lro-gal-lroc.html

astrostu
2012-Oct-14, 12:29 AM
What's the odd feature, Don? I just see craters ...

Don J
2012-Oct-14, 02:02 AM
What's the odd feature, Don? I just see craters ...
The sharp dark edge feature in the center of the image it looks like a"wall". Zoom in for more details.

http://i1008.photobucket.com/albums/af201/feelfree222/tmp-1.png?t=1350156362

astrostu
2012-Oct-14, 03:46 AM
I'm sorry, I see a lot of pixelation of craters. Try using the ACT-REACT (http://target.lroc.asu.edu/da/qmap.html) map and finding it -- it'll show you images at up to 50 cm/px and it's corrected for viewing geometry.

Don J
2012-Oct-14, 05:07 AM
Thanks for the link to the ACT-React tool.
Here it is:
Nothing to worry about finally, the dark sharp edge is a basalt formation.

http://i1008.photobucket.com/albums/af201/feelfree222/tmp-4.png?t=1350190453

astrostu
2012-Oct-14, 05:29 AM
Yeah, so I see a younger crater with impact melt on the floor superposed on the rim of a larger, older, central-peak and terraced crater that has significant modification (wall collapse, ejecta emplacement) due to the crater that formed on the rim. And lots of shadows are present.

IreneAnt
2012-Oct-16, 06:21 PM
I agree with astrostu. What you are seeing is just a coincidental alignment of shadows and impact melts that make your eye think it is seeing one big solid line.

astrostu
2012-Oct-16, 06:36 PM
FYI: For those who want a direct link to the area. (http://target.lroc.asu.edu/da/qmap.html?mv=eqc&mcx=4852937.69461&mcy=1493755.12724&mz=7) Having the layer colored by topography I think helps in this case show what's going on.

Don J
2012-Oct-16, 06:59 PM
I agree with astrostu. What you are seeing is just a coincidental alignment of shadows and impact melts that make your eye think it is seeing one big solid line.
I was in agreement with astrotu explanation that is why i have not make further comments.

Don J
2012-Oct-17, 03:33 AM
FYI: For those who want a direct link to the area. (http://target.lroc.asu.edu/da/qmap.html?mv=eqc&mcx=4852937.69461&mcy=1493755.12724&mz=7) Having the layer colored by topography I think helps in this case show what's going on.
Thanks!
I don't know if this is the impression also for other members but your explanation about -(wall collapse, ejecta emplacement) due to the crater that formed on the rim- seem to be more evident (visible)in black and white rather than with the false color shaded relief feature activated.

publiusr
2012-Oct-20, 05:11 PM
Meteor Crater's own Barringer astrobleme is actually rather square shaped. Not the first: http://science.nasa.gov/science-news/science-at-nasa/2000/ast26sep_1/

Richardn
2013-Sep-27, 02:09 AM
I find this odd. Looks like the shadow is opposite from adjacent craters so it is standing above the surrounding terrain. It is near the Apollo 17 landing site:

http://bit.ly/191Em5a

R.A.F.
2013-Oct-01, 01:33 PM
I see nothing unusual in the linked image...just that lone boulder.

...and I'm trying to see what you mean by "the shadow is opposite", but to me all the shadows appear as they should...

...so what am I missing?

NoisyAstronomer
2013-Oct-10, 05:30 AM
Yup, look like boulders. You are correct in noting that the shadows of something above the level surface are "opposite" of those of craters, which are depressions. Helps you pick them out more easily!

(Wonder if it's not a boulder but indeed Apollo 17 debris? How close to landing site?)

- Nicole

galacsi
2013-Oct-10, 03:13 PM
I find this odd. Looks like the shadow is opposite from adjacent craters so it is standing above the surrounding terrain. It is near the Apollo 17 landing site:

http://bit.ly/191Em5a

I don't seeanything odd,but I love this tool !