Astronomers, to help deal with public fascination, and sometimes undue alarm, about possible threats from asteroids, devise scale that rates likelihood that particular asteroid or comet will collide with Earth;
Comets - News - Science - The New York Times - [ 翻译此页 BETA ] Astronomers, to help deal with public fascination, and sometimes undue alarm, about possible threats from asteroids, devise scale that rates likelihood that particular asteroid or comet will collide with Earth; new scale described ... topics.nytimes.com/top/news/science/topics/comets/index.html?offset=50& - 52k - |
[此贴子已经被作者于2006-12-25 21:20:19编辑过] |