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This widely-reported event was instrumental in the establishment of NASA's Planetary Defense Coordination Office in January 2016. #AsteroidWatch
Read more about the Chelyabinsk event's role in upping our planetary defense game: https://go.nasa.gov/3IhJKqt
#NASAhistory
Read more about the Chelyabinsk event's role in upping our planetary defense game: https://go.nasa.gov/3IhJKqt
#NASAhistory
A History of Near-Earth Objects Research
Often seen as the solar system's rubble, asteroids and comets were largely ignored in the 20th century until recently. Increasingly, they have been seen by scientists as objects worthy of study, by the general public and the U.S.Michele Ostovar (NASA)