Η NASA published a map today from the program Near Earth Object (NEO). This program searches for and records all small asteroids that have managed to enter the Earth's atmosphere. THE χάρτης of NASA shows the drop points around the world. 
The map was released to the scientific community, and depicts data collected by US government sensors from 1994 to 2013. data show that the Earth's atmosphere has been penetrated by many small asteroids. There are 556 different recorded cases over a 20 year period.
Almost all asteroids of this size decompose into the atmosphere and are usually harmless. The notable exception was that of the Chelyabinsk asteroid, which was the largest asteroid that landed the Earth at this time.
The new map data could help scientists improve their estimatespriceations of the Near Earth Object (NEO) size distribution.
Finding and characterizing hazardous asteroids to protect our planet is a high priority for NASA. It's one of the reasons NASA has increased its investment in detection asteroids, characterizing and mitigating their activities over the past five years.
In addition, NASA is developing aggressive strategies with its partners in the US and abroad for detecting, monitoring, and characterizing the Near Earth Object. These activities are aimed at helping to identify a Near Earth Object that could endanger the Earth with a bump.
