Moonwalking astronauts will have sleeker, more flexible spacesuits that come in different sizes when they step onto the lunar surface later this decade.

Exactly what that looks like remained under wraps. The company designing the next-generation spacesuits, Axiom Space, said Wednesday that it plans to have new versions for training purposes for NASA later this summer.

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 distance that has required extremely careful management of the spacecraft's fuel supply.