Eris

1. Should eris , and many other objects circling the sun beyond neptune 's orbit ?

厄里斯和许多其他在海王星轨道绕着太阳转动的天体，又该不该是行星呢？

2. The scientist who discovered eris , caltech astronomer mike brown , thinks pluto 's demotion was the right move .

发现厄里斯的科学家加州理工学院的天文学家mikebrown认为，冥王星的降级是正确的。

3. Those new rules cast pluto out , and put it in a new , and very exclusive , club of just five confirmed dwarfs in the solar system : pluto , ceres , haumea , makemake and eris .

那些新的规则将冥王星驱逐了出去，并放到了一新的、非常专一，太阳系中仅有的五个确认矮星族中：冥王星、克瑞斯、哈乌美亚、乌神星及厄里斯。

4. Astronomers had found at least three new objects that were as big as pluto ( quaoar , sedna and eris ) , and the international astronomical union needed to find a new way to classify exactly what makes a planet a planet .

航天员至少发现三个新的与冥王星一样大的目标（夸欧尔、塞德娜和厄里斯），国际天文学联合会需要找到新方法来确切也按星球组成来进行分类。

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