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Asteroid's surprise close approach illustrates need for more eyes in the sky

On 25 July, an asteroid the size of a football field flew by Earth, coming within 65 000 km of our planet’s surface during its closest approach – about one fifth of the distance to the Moon.

ison 2019 ok flyeye close approach

Comet ISON: recent observations of an approaching body

A new series of images from Gemini Observatory shows Comet C/2012 S1 (ISON) heading toward an extremely close rendezvous with the Sun. The images have been takenbetween February and May 2013 and...

c2012 s1 ison comet