NASA SLS pad
Illustration of NASA's Space Launch System on the pad at the Kennedy Space Center. The rocket's first launch, on a mission designated EM-1, is now scheduled for no earlier than December 2019.

NASA announced Nov. 8 that it is now planning a first launch of its Space Launch System rocket no earlier than December 2019, even as a review concluded the rocket isn’t likely to fly until mid-2020.

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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...