'Potentially hazardous' Apollo-class asteroid sails harmlessly past Earth - Livescience.com

Asteroid 2007 FF1 just whizzed by at 29,800 mph (47,950 km/h)

A space rock the size of a skyscraper that scientists deemed "potentially hazardous" sailed harmlessly past Earth today (April 1) around 4:35 p.m. ET. Even though theasteroid only flew within roug… [+2024 chars]

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