Sentinel-6 in orbit
Sentinel-6 Michael Freilich, launched Nov. 21, is the latest in a series of satellites going back nearly three decades to track rising sea levels.

A SpaceX Falcon 9 successfully launched Nov. 21 the latest in a series of satellites developed by the United States and Europe to track rising sea levels.

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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...