Twenty years ago, Pluto got demoted(降级，降职). After a vote by the International Astronomical Union (IAU) in August 2006, Pluto was relegated(降级，使降位) from major planet to dwarf planet status. Our solar system dropped from nine planets to eight. At the time, many scientists were unhappy with the decision. Two decades on, the debate is, if anything(如果说有变化的话), even more polarised(两极分化的).
二十年前，冥王星被降级了。2006年8月，国际天文学联合会（IAU）投票决定，将冥王星从大行星降级为矮行星。我们的太阳系从九大行星变成了八大行星。当时，许多科学家对这一决定感到不满。二十年过去了，这场争论如果说有什么变化，那就是更加两极分化了。
“The definition of a planet they created, you can’t use it at all,” says Philip Metzger, the director of the Stephen W Hawking Centre for Microgravity Research and Education at the University of Central Florida.(“他们创造的行星定义，你根本没法用，”菲利普·梅茨格说。) “It makes the definition of a planet completely non-useful(无用的，没用的) in science.”
“他们创造的行星定义，你根本没法用，”中佛罗里达大学斯蒂芬·霍金微重力研究与教育中心主任菲利普·梅茨格说。“它让行星的定义在科学上完全失去了用处。”
Metzger is one of a number of scientists and lay people(外行，非专业人士) who consider Pluto’s demotion a big mistake.
梅茨格是众多认为冥王星被降级是一个重大错误的科学家和普通人之一。