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Astronomy Picture of the Day

Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2025 May 17

Explanation: the Mars Reconnaissance Orbiter's HiRISE camera shows weathered craters and windblown deposits in southern . A striking shade of blue in standard HiRISE image colors, to the human eye the area would probably look grey or a little reddish. But human eyes have not gazed across this terrain, unless you count the eyes of NASA astronauts in the sci-fi novel, "," by Andy Weir. The novel chronicles the adventures of Mark Watney, an astronaut stranded at the fictional Mars mission Ares 3 landing site, corresponding to the coordinates of this cropped HiRISE frame. For scale, Watney's 6-meter-diameter habitat at the site would be about 1/10th the diameter of the large crater. , the Ares 3 landing coordinates are only about 800 kilometers north of the (real life) Carl , the 1997 .

Authors & editors: () & ()
NASA Official: Amber Straughn .

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