Hubble image of Dimorphos
A Hubble Space Telescope image of the asteroid Dimorphos shows a tail of debris 10,000 kilometers long created by the impact of the DART spacecraft, which changed the orbit of Dimorphos around the larger asteroid Didymos by 32 minutes.

A NASA spacecraft that deliberately collided with a near Earth asteroid last month changed its orbital period by more than a half-hour, exceeding expectations for the planetary defense demonstration.

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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...