Vast, a startup developing artificial-gravity space stations, announced Feb. 21 that it acquired launch services company Launcher, using its technology to further space station plans while ending developing of a small launch vehicle.

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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...