Lucy solar array
The Lucy spacecraft and one of its two solar arrays, 7.3 meters in diameter, during tests before its Oct. 16 launch.

Engineers have identified the likely reason one of two solar arrays on NASA’s Lucy asteroid mission failed to latch in place after launch, but NASA is still studying whether to fix the problem.

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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...