An asteroid, estimated to be around a kilometre wide, has had a close brush past Earth. 

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An asteroid, estimated to be around a kilometre wide, has had a close brush past Earth. See omnystudio.com/listener for privacy information.

An asteroid, estimated to be around a kilometre wide, has had a close brush past Earth.&nbsp;

See omnystudio.com/listener for privacy information.

Share Astrophysicists 'keeping tabs' as massive asteroid hurtles past Earth

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