英語短文：小兄弟威脅著地球 2
[6] One group, led by John Matese, professor of physics at the University of Louisiana at Lafayette, confirms the notion that it is most likely to be a brown dwarf, a star that never accumulated enough mass to ignite and which has simply sat in space smouldering for billions of years.
[7] Matese studied 82 comets from the Oort Cloud and found common elements in the shape of their orbits that could only be explained if they had been influenced by the gravitational pull of an object several times the size of Jupiter and existing about 25,000 times farther from the Sun than the Earth.
[8] Matese said: "A companion to the Sun orbiting at these distances would have little effect on the planets. But it would play a big role in the way comets ' made their way' from their birth places in the planetary disc out to the Oort Cloud and on now they can return to the inner solar system."
[9] Further research was published by Richard Muller, professor of physics at the University of California, Berkeley, following analyses of moon rock samples brought back to Earth by Apollo 14.
[10] The absence of a protective atmosphere means the moon has been subjected to intense bombardment in its 4.5 billion-year existence.
[6]一個由拉斐特的路易斯安娜大學物理學教授約翰·馬泰塞領導的小組證實了一個想法，那就是它最有可能是一顆褐矮星，這是一種永遠也不能積聚足夠的質量著火燃燒的星，它只是在太空中數十億年地無焰悶燒。
[7]馬泰塞研究了來自奧爾特云的82顆彗星，發現在它們軌道的形狀上有共同的因素，那只有在它們是被一個數倍大于木星的天體的引力作用所影響，且這個天體距太陽的距離比地球要遠25，0000倍的情況下才能解釋。
[8]馬泰塞說：“一個離太陽如此遙遠的伴星對行星的影響是微乎其微的。但是，在彗星從它們在行星盤的誕生地'前進'到奧爾特云的方式上，以及它們能返回太陽系內部的途徑上，這顆星扮演著重要的角色。”
[9]加州大學伯克利分校的
物理學教授理查德·馬勒在分析了“阿波羅14號”帶回的月球巖石標本之后，公布了進一步的研究成果。
[10]由于缺乏大氣的保護，月球在它存在的45億年間遭受了強烈的撞擊。
[6] One group, led by John Matese, professor of physics at the University of Louisiana at Lafayette, confirms the notion that it is most likely to be a brown dwarf, a star that never accumulated enough mass to ignite and which has simply sat in space smouldering for billions of years.
[7] Matese studied 82 comets from the Oort Cloud and found common elements in the shape of their orbits that could only be explained if they had been influenced by the gravitational pull of an object several times the size of Jupiter and existing about 25,000 times farther from the Sun than the Earth.
[8] Matese said: "A companion to the Sun orbiting at these distances would have little effect on the planets. But it would play a big role in the way comets ' made their way' from their birth places in the planetary disc out to the Oort Cloud and on now they can return to the inner solar system."
[9] Further research was published by Richard Muller, professor of physics at the University of California, Berkeley, following analyses of moon rock samples brought back to Earth by Apollo 14.
[10] The absence of a protective atmosphere means the moon has been subjected to intense bombardment in its 4.5 billion-year existence.
[6]一個由拉斐特的路易斯安娜大學物理學教授約翰·馬泰塞領導的小組證實了一個想法，那就是它最有可能是一顆褐矮星，這是一種永遠也不能積聚足夠的質量著火燃燒的星，它只是在太空中數十億年地無焰悶燒。
[7]馬泰塞研究了來自奧爾特云的82顆彗星，發現在它們軌道的形狀上有共同的因素，那只有在它們是被一個數倍大于木星的天體的引力作用所影響，且這個天體距太陽的距離比地球要遠25，0000倍的情況下才能解釋。
[8]馬泰塞說：“一個離太陽如此遙遠的伴星對行星的影響是微乎其微的。但是，在彗星從它們在行星盤的誕生地'前進'到奧爾特云的方式上，以及它們能返回太陽系內部的途徑上，這顆星扮演著重要的角色。”
[9]加州大學伯克利分校的
物理學教授理查德·馬勒在分析了“阿波羅14號”帶回的月球巖石標本之后，公布了進一步的研究成果。
[10]由于缺乏大氣的保護，月球在它存在的45億年間遭受了強烈的撞擊。
