NPR

An Asteroid Is Swinging By Earth Today For Its Closest Visit In 400 Years

Don't worry: Astronomers say asteroid 2014 JO25, which is more than a third of a mile wide, will fly harmlessly past our planet. Still, it should come close enough to be visible with small telescopes.
This composite of 30 images of asteroid 2014 JO25 was generated with radar data collected using NASA's Goldstone Solar System Radar in California's Mojave Desert.

Earth is welcoming a rather hefty visitor to the neighborhood Wednesday — an asteroid that hasn't swung by these parts in roughly 400 years. About as big as the , asteroid 2014 JO25 is coming so close that its visit should be

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