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In a video posted online Sunday, astrophysicist Vladimir Lipunov says the newly discovered asteroid could collide with Earth during its three-year orbital cycle. A giant meteor exploded over a Russian city in 2013.
A Russian astrophysicist says his team has located a huge, mountain-sized asteroid whose orbit crosses the Earth's every three years.
Even though experts say the giant object, known as 2014 UR116, poses no immediate threat of collision, its unexpected discovery underscores how little is still known about asteroids and their unpredictable orbits …. http://news.yahoo.com