An asteroid barely missed Earth last week, and no one knew it was coming

An asteroid about the size of a refrigerator shot past Earth last week, and astronomers didn't know the object existed until hours after it was gone. It was a close call (from a cosmic perspective); the space rock's trajectory on Oct. 24 carried it over Antarctica within 1,800 miles (3,000 kilometers) of Earth — closer than some satellites — making it the third-closest asteroid to approach the planet without actually hitting it, CNET reported.
Read more: https://www.space.com/surprise-asteroid-flyby-2021-ua1?source=Snapzu