Here's why the deep-space journey of Europe's JUICE probe will take so long.
Such variations in Jupiter orbiter travel times stem from several factors. For example, the distance betweenand Jupiter varies greatly over time. In addition, orbiter missions don't take direct paths to the giant planet; they travel a scenic route around the inner solar system, flying by other planets to get speed-boosting, trajectory-sculpting"gravity assists."
The mission"will do a complex sequence of gravity assist maneuvers, starting one year after launch, taking moon and Earth gravity assists, both bodies at the same time to get the extra energy," ESA scientist Alessandro Atzei said during a JUICE press briefing on April 6."And then we have a Venus flyby gravity assist [and] two more Earth gravity assists in 2026 and 2029 to arrive at Jupiter in the distant July of 2031.
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