Hera Didymos
An illustration of ESA’s proposed Hera spacecraft scanning the moon of the asteroid Didymos with a lidar instrument.

A year and a half after ministers declined to fund one mission to an asteroid, the European Space Agency is working on a second such mission that could support planetary defense efforts.

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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...