2014-11-15. New NASA map shows Earth bombarded by asteroids.

posted Nov 16, 2014, 11:17 AM by Alan Gould
By Shelby Lin Erdman, CNN. For GSS A Changing Cosmos chapter 1. Excerpt: Fiery asteroids smash into Earth's atmosphere at such a stunning rate, .... A new NASA map [http://www.nasa.gov/jpl/bolide-events-1994-2013/#.VGjvfoeRl7o] from the ... Near-Earth Object Program [http://neo.jpl.nasa.gov/faq/], reveals that more than 556 space rocks smashed into the atmosphere over a 20-year period between 1994 and 2013. ...The good news is most are small and harmless fireballs that disintegrate when they hit the atmosphere, .... An obvious exception occurred on February 15, 2013, when an asteroid as large as 55 feet in diameter with a mass of up to 10,000 tons crashed to earth in the Urals region in Russia, streaking through the morning sky in Chelyabinsk [http://www.youtube.com/watch?v=ZMT7rIhETJM] before landing in a fiery explosion that injured more than a thousand people and caused an estimated $33 million in damage. ...NASA said the Chelyabinsk asteroid was the largest to hit the Earth during the agency's mapping period. [see also Meteor blast at local school - https://www.youtube.com/watch?v=jn92CMmTd9o] ...The NEO Program helps detect and track space rocks that could cause a potential danger to Earth. "The new data could help scientists better refine estimates of the distribution of the sizes of NEOs," NASA explained. "Finding and characterizing hazardous asteroids to protect our home planet is a high priority." ...NASA is also developing an Asteroid Redirect Mission called ARM. In a plan that sounds a lot like science fiction, NASA wants to redirect a space rock into orbit around the moon by the 2020s so astronauts can study it more closely. The mission could also help develop ways to deflect an asteroid should one be found on a collision course for Earth. See also NASA's All Sky Fireball Network [http://fireballs.ndc.nasa.gov/].... Source: http://www.cnn.com/2014/11/15/us/nasa-asteroid-map/index.html.