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Why incoming asteroids shouldn't keep you up at night
Key Excerpts from Article on Website of Christian Science Monitor


Christian Science Monitor, December 11, 2017
Posted: January 22nd, 2018
https://www.csmonitor.com/Science/2017/1211/Why-incoming-ast...

Every once in awhile, as we Earthlings strive to explore the cosmos, were reminded that bits of the cosmos occasionally visit Earth, too. One such reminder came in the form of a blazing green fireball streaking across the predawn New Jersey sky earlier this month. Police dashcam footage ... shows a meteor plunging into the Earth's atmosphere and exploding in a brilliant flash. On Nov. 9 ... an asteroid designated 2017 VL2 came within 75,000 miles of Earth. Despite news reports that the asteroid ... carried enough energy to obliterate New York City, the asteroid the 48th known one to pass within the moon's orbit this year so far would have actually burned up in the atmosphere, causing little, if any, damage. The most important message to get across is that asteroid impacts are extremely unlikely, Paul Chodas, manager for the Center for Near-Earth Object Studies at NASAs Jet Propulsion Laboratory in Pasadena, Calif. In 1998, Congress mandated that NASA find 90 percent of asteroids more than 1 kilometer wide. NASA met this goal in 2011, but in the meantime, Congress expanded its mission to include include 90 percent of asteroids 450 feet or larger. Scientists say they have detected about a third of these so far. The bigger the asteroid, the lower the chance of impact: The odds of an asteroid 1 kilometer wide hitting Earth in any given year are 1 in about 500,000, and even an object 450 feet wide has just a 1-in-30,000 chance of impact.

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