Juno at Jupiter
An illustration of NASA's Juno spacecraft in orbit around Jupiter.

As engineers continue to study an engine issue with NASA’s Juno spacecraft, the mission’s principal investigator said Dec. 13 that a problem that put the spacecraft into a safe mode in October was related to a problem handling data from one of the spacecraft’s instruments.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...