APOD 2005-02-28
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- Asternaut
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APOD 2005-02-28
The picture on 02-28 APOD site shows what might be frozen water plates covered by dust, but there are two features I am curious about. The light source is coming from the left; there is illumination on the left side of the plates, and shadows on the right. The three small craters have shadows on the left and highlights on the right, consistent with a depression, but the two objects in the upper right have illumination on the left, and shadows on the right, which suggests they are domes. The illumination immediately to the right of the domes could be the edge of an old crater, but what would make the ground within the crater to bulge up above the level plane of the surface? It reminds me of the new dome forming on Mt. St. Helens. Would water filling the craters create a dome?
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- Commodore
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EDITED: Since the problem resolved... Converting image to LINK
Last edited by makc on Tue Mar 01, 2005 3:56 pm, edited 2 times in total.
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- Ensign
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What are you seeing
I've looked at this pic again since you mentioned it, but I don't see what you're seeing.
Firstly, the light source is coming from the right, not the left.
Secondly, I only see two craters (large) and not three as you said.
Thirdly, what "two objects in the upper right"?
Perhaps you could load the image in a paint program and mark the features you're talking about. I get the feeling we're looking at two different pictures.
I see two big craters (with sort of mushy/splattered-edges, very interesting!) a mountain on the right (which seems to have influenced the flow of water coming from the right) and a dark feature in the bottom left.
BTW, Please don't post a full size image in your reply.
Boldra
Firstly, the light source is coming from the right, not the left.
Secondly, I only see two craters (large) and not three as you said.
Thirdly, what "two objects in the upper right"?
Perhaps you could load the image in a paint program and mark the features you're talking about. I get the feeling we're looking at two different pictures.
I see two big craters (with sort of mushy/splattered-edges, very interesting!) a mountain on the right (which seems to have influenced the flow of water coming from the right) and a dark feature in the bottom left.
BTW, Please don't post a full size image in your reply.
Boldra
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- Asternaut
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- Asternaut
- Posts: 3
- Joined: Mon Feb 28, 2005 10:22 pm
On second thought:
I went to the ESA website, where this photo originally came from. It is at http://www.esa.int/SPECIALS/Mars_Expres ... M4E_0.html
and this photo is not like the image posted in Makc's reply. It is like the one that I have asked my original question about. The two large craters are in the upper right and they look like domes. I downloaded the image from ESA, dumped it into Photoshop, and flipped the image horizontally, and came up with the image Makc posted. But the credits on the bottom are also flipped and read backwards. So, Makc, could you re-post your photo with the credits intact? Your image makes more sense, but it's not the same as the image on the ESA website.
I went to the ESA website, where this photo originally came from. It is at http://www.esa.int/SPECIALS/Mars_Expres ... M4E_0.html
and this photo is not like the image posted in Makc's reply. It is like the one that I have asked my original question about. The two large craters are in the upper right and they look like domes. I downloaded the image from ESA, dumped it into Photoshop, and flipped the image horizontally, and came up with the image Makc posted. But the credits on the bottom are also flipped and read backwards. So, Makc, could you re-post your photo with the credits intact? Your image makes more sense, but it's not the same as the image on the ESA website.
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- Commodore
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(1) First of all, things look like something as long as somebody (in this case - you) looks at them; the image itself is absolutely flat - it has no neither craters nor domes on it - it is all just about light pixels and dark pixels... which brings me to (2) - I made exactly same thing.dawnk wrote:...[original] photo is not like the image posted in Makc's reply... The two large craters are in the upper right and they look like domes (1). I downloaded the image from ESA, dumped it into Photoshop, and flipped the image horizontally, and came up with the image Makc posted (2).
You may check this and this out of interest.