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Anna Moneymaker, David Becker, Douglas Rissing/Getty Images; Isabel Fernandez-Pujol
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Asteroid 99942 Apophis is fast approaching our home planet for an uncomfortably close encounter in 2029. In order to prepare for the rare event, NASA is calling for ideas for low cost missions to rendezvous with Apophis, but the space agency already has a pair of asteroid probes ready to take on the task.
Courtesy of Mykhaylo Fridlyand
AP Photo/David Zalubowski
Aaron Lavender