Mysterious burst of gravitational waves hit Earth, baffling astronomers

A mysterious deep space event could have stretched and squeezed Earth last week.

Astronomers observed a split-second burst of gravitational waves on Jan. 14, but they can’t figure out precisely where the burst came from.

These waves are disturbances in space-time that are generally caused by accelerated masses, such as black holes or neutron stars, colliding with each other.

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