Engineers Keep an Eye on Fuel Supply of NASA’s Oldest Mars Orbiter

Measuring the fuel supply on Odyssey, a decades-old spacecraft without a fuel gauge, is no easy task. Since NASA launched the 2001 Mars Odyssey Orbiter to the Red Planet almost 22 years ago, the spacecraft has looped around Mars more than 94,000 times. That’s about the equivalent of 1.37 billion miles (2.21 billion kilometers), a …

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