26 February 2013 Last updated at 04:25 ET
Russia meteor's origin tracked down
By Paul Rincon
Science editor, BBC News website
Astronomers have traced the origin of a meteor that injured about 1,000 people after breaking up over central Russia earlier this month.
Using amateur video footage, they were able to plot the meteor's trajectory through Earth's atmosphere and then reconstruct its orbit around the Sun.
As the space rock burned up over the city of Chelyabinsk, the shockwave blew out windows and rocked buildings.
The team, from Colombia, has published details on the Arxiv website.
Numerous videos of the fireball were taken with camera phones, CCTV and car-dashboard cameras and subsequently shared widely on the web. Furthermore, traffic camera footage of the fireball had precise time and date stamps.