Earth will have ‘a very close encounter’ with an asteroid tonight, NASA says

There’s no reason for alarm — but, a NASA engineer calls it “one of the closest approaches by a known near-Earth object ever recorded.” It will be only 2,200 miles above the Earth’s surface.There’s no reason for alarm — but, a NASA engineer calls it “one of the closest approaches by a known near-Earth object ever recorded.” It will be only 2,200 miles above the Earth’s surface.