英語短文：小兄弟威脅著地球 3
[11] Muller's breakthrough was to find a way to date" how long ago any particle was melted--meaning he could build up a picture of whether the moon gets a constant barrage or suffers spells of intense bombardment.
[12] He said; "The evidence clearly shows that the moon has gone through spells of relatively frequent impacts and others of reduced intensity. I believe it is likely that this is because the Oort Cloud is being disturbed by a massive body that is throwing comets out of stable orbits, a small fraction of which could reach the Earth."
[13] Muller and others believe that the dark star probably takes about 26m years to complete an orbit around the sun.
[14] Other scientists have already noted that mass extinctions of life on Earth seem to occur in a pattern with gaps equivalent to multiples of 26m, suggesting some regular event is causing the comets to come Earth's way.
[15] The best-known such event was the one that wiped out the dinosaurs 65m years ago, but that was not the worst; the planet has suffered several such large mass extinctions
[16] Astronomers have found the first Earth-sized planet orbiting another star. The discovery raises the chances of finding planets that could support life as we know it.
[11]馬勒的突破是他找到了一種確定粒子被融化的年代的方法，這意味著他可以確立這樣一幅畫面，即月球是受到接二連三的轟擊還是經歷了間歇性的強烈的粒子輻射。
[12]他說：“有跡象清楚表明，月球經歷了比較頻繁的撞擊，以及其它強度減少的撞擊。我認為這可能是由于奧爾特云受到一個正在把彗星拋出穩定軌道的大天體的擾動，其中一小部分彗星可能會到達地球。”
[13]馬勒和其他一些人認為，這顆暗星繞太陽運行一周大約要用2600萬年的時間。
[14]另一些科學家已經注意到，地球生物的物種滅絕現象出現的間隔是2600萬的倍數，這說明了某個規律性事件造成彗星降臨在地球上。
[15]這類事件中最著名的一個就是6500萬年前恐龍的滅絕，但這還不是最壞的;這個星球已經經歷了幾次如此大規模的滅絕。
[16]天文學家已經發現了第一個像地球一樣大小的圍繞另一顆星運行的行星。這個發現增加了找到我們熟知的能維持生命的行星的機會。
[11] Muller's breakthrough was to find a way to date" how long ago any particle was melted--meaning he could build up a picture of whether the moon gets a constant barrage or suffers spells of intense bombardment.
[12] He said; "The evidence clearly shows that the moon has gone through spells of relatively frequent impacts and others of reduced intensity. I believe it is likely that this is because the Oort Cloud is being disturbed by a massive body that is throwing comets out of stable orbits, a small fraction of which could reach the Earth."
[13] Muller and others believe that the dark star probably takes about 26m years to complete an orbit around the sun.
[14] Other scientists have already noted that mass extinctions of life on Earth seem to occur in a pattern with gaps equivalent to multiples of 26m, suggesting some regular event is causing the comets to come Earth's way.
[15] The best-known such event was the one that wiped out the dinosaurs 65m years ago, but that was not the worst; the planet has suffered several such large mass extinctions
[16] Astronomers have found the first Earth-sized planet orbiting another star. The discovery raises the chances of finding planets that could support life as we know it.
[11]馬勒的突破是他找到了一種確定粒子被融化的年代的方法，這意味著他可以確立這樣一幅畫面，即月球是受到接二連三的轟擊還是經歷了間歇性的強烈的粒子輻射。
[12]他說：“有跡象清楚表明，月球經歷了比較頻繁的撞擊，以及其它強度減少的撞擊。我認為這可能是由于奧爾特云受到一個正在把彗星拋出穩定軌道的大天體的擾動，其中一小部分彗星可能會到達地球。”
[13]馬勒和其他一些人認為，這顆暗星繞太陽運行一周大約要用2600萬年的時間。
[14]另一些科學家已經注意到，地球生物的物種滅絕現象出現的間隔是2600萬的倍數，這說明了某個規律性事件造成彗星降臨在地球上。
[15]這類事件中最著名的一個就是6500萬年前恐龍的滅絕，但這還不是最壞的;這個星球已經經歷了幾次如此大規模的滅絕。
[16]天文學家已經發現了第一個像地球一樣大小的圍繞另一顆星運行的行星。這個發現增加了找到我們熟知的能維持生命的行星的機會。
