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

An appropriation bill signed into law Feb. 15 gives NASA $21.5 billion for fiscal year 2019, $1.6 billion above the administration’s original request.

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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...