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

Key members of the House and Senate say they continue to work on space-related legislation, including a NASA authorization bill, but the two branches of Congress appear to remain far apart on their bills.

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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...