Officials with a NASA airborne observatory responded to a stinging rebuke in the latest astrophysics decadal survey by arguing that the facility, targeted for termination, is essential to the agency’s broader science program.

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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...