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Hubble recently showed a fourth moon orbiting Pluto. Astronomers temporarily named it P4. The moon is the smallest to be discovered around the icy dwarf planet.
最近，哈勃太空望远镜找到了绕冥王星运转的第四颗卫星。天文学家暂时将它命名为P4。在这颗有冰层的矮行星周围，它是所发现卫星中最小的一颗。
Astronomers estimate that the moon is from thirteen to thirty-four kilometers across. They first saw it in a Hubble photo taken on June twenty-eighth.
天文学家估计，这颗卫星大概有13至34公里宽。他们最先看到这颗卫星是在哈勃6月28日拍到的照片里。
The American space agency NASA launched the Hubble Space Telescope in nineteen ninety.
美国航空航天局在1990年发射哈勃太空望远镜。哈勃得以升空需要许多年的努力。
Reaching that day took years of work. Ed Weiler is NASA’s chief astronomer. Mr. Weiler has worked closely with the Hubble program since nineteen seventy-nine.
Ed Weiler是美国航空航天局的首席天文学家。Weiler从1979年开始就密切进行着哈勃项目。
发表于 2011-9-9 11:18
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发表于 2011-12-6 17:34
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