In September, Firefly announced the first successful ground test of its rocket engine at its testing facility in Briggs, Texas.

The assets of Firefly Space Systems, a company that was developing a small launch vehicle before encountering financial problems last year, will be sold this week in an auction organized by a little-known company backed by a Ukrainian entrepreneur.

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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...