By Vurdlak on October 12, 2006, with 91 Comments
What do you think this photo from Mars below represents? Is it a Convex Object or Concave Crater? Many of my friends argued on this one, before I gave them true answer. NASA said it shows “Victoria crater,” an impact crater at Meridiani Planum – near the equator of Mars. The crater is approximately 800 meters (half a mile) in diameter. Peter Hosey sent in this fabulous illusion. He said that it “Looks like a convex object, but that’s actually a crater — the Victoria Crater at Meridian Planum on Mars, photographed by the Mars Reconnaissance Orbiter.”
(31 votes)
Just a crater. Shadows are inside. None outside.
i stared at it then looked away to read the text above it and it looks as if it’s moving further away
This works better with a smoother circle crater like you see with moon craters. Where this one has ridges, the shadow totally tells you it’s a crater.
You can make it a crater by covering the bottom right corner of it and you can make it a “island” by covering the top left corner :)
Looks like a crater, that’s the only way I can see it.
uh…. crater….? (srsly?)
while on observation, what i could presume that impact of an alien object irregular in shape was so in high velocity that it just carved/sheared through the Mars surface and more or less retained its projected shape at the rim of the crater. further the retention was helped by the very cold surface of Mars as it diffused the high temperature instantly. the central portion in the crater could be perhaps due to very very hard core underneath, which resisted the falling body.
Kamal: Could you speak English please?
LOOKS CONVEX TO ME.