Debris plume of Chelyabinsk meteor. Some of the bits on the ground will go into Olympic medals, but a plume of fine debris went into the atmosphere. In four days the faster, higher part of the plume (red) went all the way around the northern hemisphere and back to Chelyabinsk. It was tracked by instruments on the Suomi NPP satellite for several months. (Image Credit: NASA's Goddard Space Flight Center Scientific Visualization)
Russian Chelyabinsk meteorite pieces go under microscope
Scientists have released microscopic images of fragments of the meteorite that hit central Russia in February. A team from the Ural Federal University was able to analyse some of the dozens of samples as soon as they were found. But the technique they used allowed them to assess the rock's chemical make-up at the microscopic level even as they snapped pictures of the fragments. This will provide extra information on the space rock's formation and journey.