Astronomers Calculate Orbit and Origins of Russian Fireball

Just a week after a huge fireball streaked across the skies of the Chelyabinsk region of Russia, astronomers published a paper that reconstructs the orbit and determines the origins of the space rock that exploded about 20-14 km (12-15 miles) above Earth's surface, producing a shockwave that damaged buildings and broke windows. Researchers Jorge Zuluaga