Crystals Found in Chelyabinsk Meteorite Dust

Never-before-seen crystals were found in meteorite dust. Massive space rock burst above Chelyabinsk, Russia, nine years ago.

On 15 Feb 2013, a 59-foot (18-meter) asteroid weighing 11,125 tonnes entered Earth's atmosphere at 41,600 mph (66,950 km/h).

Fortunately, the meteor burst 14.5 miles above Chelyabinsk, Russia, showering the region in small fragments and escaping a cataclysmic crash with the earth.

Experts said the occurrence was a wake-up call about the hazards of asteroids.
Chelyabinsk was the greatest meteor explosion since 1908's Tunguska. 

In a recent study, researchers investigated meteorite dust left behind after a meteor exploded. As meteors fire, they generate a little quantity of dust, but scientists can't discover it

NASA reports that after the Chelyabinsk meteor burst, a large cloud of dust remained in the sky for four days before falling to Earth.