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Europa or bust? Maybe not. Top 9 priorities for planetary research missions

7. Trojan Tour and Rendezvous

  • By Pete Spotts Staff writer

This New Frontiers mission would visit several so-called Trojan asteroids, a cluster of asteroids orbiting the sun at Jupiter's distance and behind the giant planet. By some estimates, the Trojan cluster contains as many asteroids as the main asteroid belt, which lies between Mars and Jupiter.

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