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By jagrier on January 5, 2018 in

As you know from having searched for impact craters on images here at CosmoQuest, some craters are are easier to spot and measure than others. One of the things that makes a crater easier to identify is a prominent shadow cast from the rim. Such shadows are created when the source of illumination (the sun) […]

By IreneAnt on January 17, 2012 in

Figuring out what is popping up at you and what is popping down and away from you in an image can be very difficult. Our brain just doesn’t have enough information to do this right a lot of the time. So, it guesses. And it uses shadows to help make those guesses. But sometimes, it […]