冥王星失去行星地位

摘要：

@@ Pluto has been kicked out of our Sun”s planetary family by astronomers who voted on Aug. 24, 2006to define a planet by three criteria2. It failed on one of them. Astronomers have been battling over3 the concept of what defines a planet all week at the general assembly of the International Astronomical Union (IAU)4 in Prague5.

机标关键词：冥王星、行星

分类号：P18;N1

在线出版日期：2007-07-26（万方平台首次上网日期，不代表论文的发表时间）

页数：共2页

页码：4,6