“I have a hard time seeing how the Europa lander project continues without Culberson.” Casey Dreier, senior space policy adviser for The Planetary Society.

The House Appropriations Committee released a spending bill May 16 that adds more than $1 billion to NASA’s original request but offers little in the way of additional funding for exploration priorities included in the agency’s recent budget amendment.

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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...