NASA's robotic Juno probe began circling the solar system's largest planet tonight (July 4), ending a nearly five-year journey through deep space and becoming the first spacecraft to enter Jupiter orbit since NASA's Galileo mission did so in 1995.
The milestone came late tonight, as Juno fired its main engine in a crucial 35-minute burn that slowed the probe enough to be captured by Jupiter's powerful gravity. That burn started at 11:18 p.m. EDT (0318 GMT Tuesday) and ended on schedule at 11:53 p.m.
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