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GroeneWolf
Sunday, January 3rd, 2010, 03:02 PM
source (http://antwrp.gsfc.nasa.gov/apod/ap090706.html)

http://antwrp.gsfc.nasa.gov/apod/image/0907/darkmercury_messenger.jpg

Unknown Dark Material on Mercury
Credit: MESSENGER, NASA, JHU APL, CIW

Explanation: What is that strange material on Mercury? When flying by Mercury last October, the robotic MESSENGER spacecraft imaged much of the solar system's innermost planet in unprecedented detail. As common in science, new data bring new mysteries. Pictured above on the lower right, a large crater -- about 100 kilometers across -- has unusual dark material of unknown composition near its center. The material's darkness does not appear to be caused by shadows, as the Sun was near zenith when the image was taken. One origin hypothesis is that the dark material was uncovered from beneath Mercury's surface during the impact that created the surrounding crater. If so, the composition of the dark mound might be similar to the composition of some mysterious dark rings also recently discovered on Mercury. Alternatively, the dark material could be related to an unusual composition of the impacting rock. MESSENGER will buzz past Mercury again later this year before entering orbit in 2011.

Alto others seem to believe it is a crashed UFO.

OneWolf
Sunday, January 3rd, 2010, 03:12 PM
Looks like a crashed U.F.O..The universe is way to big for Earthlings to be the only intelligent lifeforms.

The Horned God
Sunday, January 3rd, 2010, 03:28 PM
It just looks like a crater within a crater to me, perhaps one made by a meteor impacting at an oblique angle. Craters are circular as a rule and quite often have a raised point in the centre, as does this "object".

Too bad Gorm doesn't seem to be around any more. He'd surely have on opinion on it. :(

Ediruc
Sunday, January 3rd, 2010, 10:08 PM
Mayhap it's a crashed meteorite that just happens to look disk-like or due to the angle it looks like that :P

GroeneWolf
Monday, January 4th, 2010, 04:52 PM
Mayhap it's a crashed meteorite that just happens to look disk-like or due to the angle it looks like that :P

Which of course makes it unfortunate that the space probe could only make a picture from one side and angle. Which makes the room for speculation much larger.

frippardthree
Friday, January 8th, 2010, 06:35 AM
It does look like some kind of dent. Perhaps it is of unnatural origin, such as a UFO. It could also simply be a trick of light maybe. Maybe we will never know.