虽然这些恒星只有五十万年——按照恒星的时间尺度计算，它们还处于婴儿期——但是大都已经失去了其形成行星的由气体与尘埃组成的圆盘。
Although the stars were just half a million years old-still in their infancy in stellar time scales-most had already lost their planet-forming disks of gas and dust.
最终会导致其中一个行星输掉这场较量，失去在这个星系中存在的资格，或者被完全开除出绕恒星运行的轨道。
Eventually, one planet loses the battle and winds up in the nether regions of its solar system or kicked out of the parent star's orbital nest entirely.
梅西教授，这位宇宙学家解释说，月亮几乎地球一样的古老，失去这样奇妙的行星将是历史的一个耻辱。
Professor Massey, a cosmologist, explained that the moon was almost as old as the earth, and it would be a shame to lose such a marvelous piece of planetary history.
由于2006年对天体的重新大排位，冥王星失去了它的行星地位，水星就被列为太阳系中最小的行星。
Since the great reclassification of astronomical objects in 2006, which saw Pluto lose its planetary status, Mercury has been listed as the smallest planet in the solar system.
尽管冥王星正式失去了它行星的高级头衔，但是反对这一降级的行动正在酝酿之中。
Though Pluto has officially lost its lofty title of "planet", a rebellion against its demotion is brewing.
尽管冥王星正式失去了它行星的高级头衔，但是反对这一降级的行动正在酝酿之中。
Though Pluto has officially lost its lofty title of "planet", a rebellion against its demotion is brewing.
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