(Sky News) The biggest asteroid in more than a century has whizzed past Earth at a safe - but unusually close - distance.
Asteroid Florence and its two orbiting moons passed 4.4 million miles from the planet, its closest encounter since 1890.
It measures in at almost three miles wide - the size of 30 Egyptian pyramids stuck together - and experts predict that this was the closest the asteroid will be to Earth until 2500.
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Astronomers at the Arecibo observatory in Puerto Rico have released a video of the fly-by, and NASA is using radar images to study the asteroid's real size.
Named after Florence Nightingale, the founder of modern nursing, the asteroid was discovered in 1981.
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