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Look at the image and decide whether it is an island or a crater you are seeing. It clearly appears to be an island, doesn?t it?
Now turn the image upside down and you will see that it is, in fact, a crater.
This clever illusion shows how lighting plays an important part in our perception of a photograph and whether objects protrude or invert. Our brains perceive that a photograph is based on light projecting down from above. Scientists must be careful of interpreting images of planets like the moon correctly, so they do not confuse craters with islands!
An island, right?
Turn it upside down, and you'll see
what it really is: a crater.
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