Orbcomm posted this photo Dec. 17 of the Falcon 9 rocket that will carry its 11 satellites to orbit perhaps as soon as this weekend.

Friday’s briefing begins with SpaceX scrubbing a Falcon 9 static-fire test Thursday, but customer Orbcomm has not given up on launching before Christmas.

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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...