A NASA spacecraft circling Jupiter has hit another snag.

The space agency said Wednesday the Juno spacecraft went into safe mode, turning off its camera and instruments. It's designed to go into safe mode if it detects a problem. Juno can still communicate with Earth, but its activities are limited.

It's the latest issue for Juno, which slipped into orbit around Jupiter in July on a mission to explore its poles, atmosphere and interior.

Last week, mission managers decided to postpone an engine firing after a pair of valves that are part of the spacecraft's propulsion system didn't work as expected.

The delay means Juno won't swing close again to Jupiter until December. The spacecraft already made a close pass in August, beaming back stunning pictures of the north pole.

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