When the European Aviation Administration (ESA) issued a statement entitled Mars sleeps with one eye open on Wednesday local time, it sounded like it was going to write a science fiction horror film. The main picture shows a crater surrounded by a winding passage. Between the circular crater and the venous channel, ESA makes an imaginative jump, suggesting that it looks like a human eye.
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It is understood that the spacecraft photographed an area called aonia Terra full of craters in late April. It indicates that the channel in the image is likely to be the channel of liquid water 3.5-4 billion years ago.
You can learn a lot from such images. Different colors and shapes are clues to geology. "In the crater, a dark sand dune area is located on a shallow surface. After careful observation, you will find that there are more hills and cone-shaped hills in the crater," ESA said. "These are evidence of the accumulation of many different materials in the crater."
In addition, ESA also shared a color coded topographic map. Blue and purple represent lower areas, while higher elevations are red and white. The crater is mostly blue, about 18.6 miles (30 kilometers) wide.
Mars Express has been stationed on this red planet since 2003. It is responsible for studying the atmosphere, geology and environment of Mars, and sometimes sends back some strange landscape pictures.