Whitesides and Colglazier
George Whitesides (left) will be stepping down as chief executive of Virgin Galactic to take a new role in the company, with Disney executive Michael Colglazier taking over as CEO.

The longtime chief executive of Virgin Galactic, who moved into a new position at the company last year, has left the company but will continue to be an adviser to it.

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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...