Heading our way

时间:2019-03-08 07:06:06166网络整理admin

The odds of a global disaster caused by a collision with asteroid 1999 AN10 have shortened from one in 10 million to one in 500 000. The earlier odds related to a possible collision in 2039 (This Week, 29 May, p 14), but Paul Chodas of NASA’s Jet Propulsion Laboratory in Pasadena, California,