NASA has selected four mission concepts for additional study in the latest round of an astrophysics program, but selected missions could face delays because of budget constraints.
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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... More by Jeff Foust