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Space
Space
Science
David Blair

New fear unlocked: runaway black holes

Black Hole Albert Einstein
An illustration of many black holes spir4alinging into a larger central black hole.

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights.

Last year, astronomers were fascinated by a runaway asteroid passing through our solar system from somewhere far beyond. It was moving at around 68 kilometres per second, just over double Earth's speed around the sun.

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