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An artist's rendering of what a Class V planet might look like under this new planetary classification system. Michael Osadciw/Courtesy of University of Rochester hide caption

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Michael Osadciw/Courtesy of University of Rochester

The goals of the planetary protection officer are to protect the Earth and to protect other planets from being contaminated by substances from Earth during exploration. NASA hide caption

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NASA

Do You Have What It Takes To Be NASA's Next Planetary Protection Officer?

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This composite of 30 images of asteroid 2014 JO25 was generated with radar data collected using NASA's Goldstone Solar System Radar in California's Mojave Desert. NASA/JPL-Caltech/GSSR hide caption

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NASA/JPL-Caltech/GSSR

A computer illustration of a large asteroid colliding with Earth. (Size may not be to scale.) Such an impact is believed to have led to the death of the dinosaurs some 66 million years ago. Mark Garlick /Getty Images/Science Photo Library RM hide caption

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Mark Garlick /Getty Images/Science Photo Library RM