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I have a new post on my Guardian blog:

“On Friday evening asteroid 2012 DA14 skims closer to our planet than any other known asteroid. Although invisible to the naked eye, binoculars can bring the space rock into focus. Or simply watch the webcast



Space rock 2012 DA14 is only 50 metres across. It will pass the Earth on Friday evening (UK time) just 17,100 miles above our heads. There is no danger of a collision. Nevertheless, this is closer to the Earth than many artificial satellites.

It will pass from the southern to northern hemisphere and set the record for the closest pass of any known asteroid since systematic surveys of the sky began in the mid-1990s. ...”

You can read the post here.

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