Despite its successes last year, the leadership of NASA warns that the coming year could be more challenging as it fights to preserve its budget on Capitol Hill.

This post is only available to members.

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...