A new map shows an asteroid barrage across planet Urals . When pieces of an asteroid or comet break off from the main body , they 're referred to as meteroids . NEO Program detection program reveals hundreds of asteroid strikes . Asteroid in Russia , Chelyabinsk , was largest to impact planet during mapping . NASA helps find potentially dangerous space rocks .
A new map shows an asteroid barrage across planet Urals . NEO Program detection program reveals hundreds of asteroid strikes . Asteroid in Russia , Chelyabinsk , was largest to impact planet during mapping . NASA helps find potentially dangerous space rocks .