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NASA's Perseverance Mars rover used its Mastcam-Z camera to view Phobos, one of Mars' two moons, on Jan. 12, 2022, the 319th Martian day, or sol, of the mission. The Perseverance team took this image to measure the amount of dust in the planet's nighttime atmosphere, which can be compared to similar measurements made by imaging the Sun during the day. A key objective for Perseverance's mission on Mars is astrobiology, including the search for signs of ancient microbial life. The rover will characterize the planet's geology and past climate, pave the way for human exploration of the Red Planet…