BE-4 hotfire
A Blue Origin BE-4 engine during its first hotfire test.

United Launch Alliance announced Sept. 27 that it has selected Blue Origin to provide the main engine for its next-generation Vulcan launch vehicle, a decision long expected by the industry.

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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...