搜尋此網誌

2010年12月9日星期四

大型的黑暗物體'潛伏在太陽系的邊緣投擲彗星往地球'

大型的黑暗物體'潛伏在太陽系的邊緣投擲彗星往地球'
Massive dark object 'lurking on edge of solar system hurling comets at Earth'

By Daily Mail Reporter
Last updated at 8:50 AM on 8th December 2010
Translation by Autumnson Blog

A massive dark object may be lurking on the edge of our solar system, according to scientists.
一巨大的黑暗物體可能潛伏在我們太陽系的邊緣,根據科學家。
Most comets that fly into the inner solar system seem to come from the outer region of the Oort cloud - a region of icy dust and debris left over from the birth of the solar system.
大部份飛進太陽系內部的彗星,似乎來自奧爾特雲 的外部地區 -- 一個冰塵和碎片的地區被遺留自太陽系的誕生。
The cloud starts from a point about 93 billion miles from the Sun and stretches for around three light years and contains billions of comets, most of them small and hidden.
那雲開始自一點距太陽約九百三十億英里和綿延約三光年,及含有以十億計的彗星,其中大部分是細小和隱蔽的。
A Nasa graphic which illustrates how the Oort Cloud surrounds our solar system. Scientists believe that an object with a huge mass may be pushing comets towards Earth from the cloud
一張美國宇航局的圖像,說明奧爾特雲如何包圍我們的太陽系。科學家們認為,一件具有巨大質量的物體可能從雲推動彗星朝向地球

Now new calculations suggest a large object that is up to four times as big as Jupiter could be responsible for sending them in our direction.
現在新的計算提出,有一大物體四倍於木星般大,可能負責在我們的方向發送它們。
The scientists have analysed the comets in the Oort cloud and deduced that 25 per-cent of them would need a nudge by a body of at least Jupiter size before they changed orbit.
科學家們已分析奧爾特雲裏的彗星和推斷它們的25%,將需要一個由至少是木星大小的個體微調,在它們改變軌道之前。
Astrophysicists John Matese and Daniel Whitmire at the University of Louisiana came up with theory said that 'something smaller than a Jovian mass would not be strong enough to perform the task'.
在路易斯安那大學的天體物理學家約翰 Matese和丹尼爾惠特邁爾,得出理論說'一些小於木星質量的東西將不足以強勁去執行任務'。
They believe that our solar system has a hidden 'companion' that has so far remained undetected.
他們相信我們的太陽系有一隱藏的'良朋',但迄今仍未被探測到。
The scientists have been studying the cloud using WISE, Nasa's infra-red space telescope that is capable of detecting dark objects.
科學家一直用WISE研究那雲,WISE是美國宇航局的紅外線太空望遠鏡,能夠探測黑暗的物體。
Matese said: 'I think this whole issue will be resolved in the next five to 10 years, because there’s surveys coming on line that will dwarf the comet sample we have today.

'Whether these types of asymmetries in the directions that comets are coming from actually do exist or not will definitely be hammered out by those surveys,' Matese added. 'We anticipate that WISE is going to falsify or verify our conjecture.'

About 3,200 long-period comets are known, one of the most famous being Hale-Bopp which was visible to even the naked eye during 1996 and 1997.
Halley's Comet, which reappears about every 75 years, is a 'short-period' comet from a different part of the Solar System called the Kuiper Belt.

A large planet that is in orbit outside the solar system may be pushing comets towards Earth
一個大行星在太陽系外的軌道運行,可能會推彗星往地球

If it exists the new planet is so freezing cold it is difficult to spot, researchers said.

It could be found up to 30,000 astronomical units from the sun. One AU is the distance between the Earth and the sun, about 93 million miles.
Scientists have already proposed that a hidden star, which they call 'Nemesis,' might exist a light-year or so away from our sun.

They suggest that during its orbit it would regularly enter the Oort cloud, jostling the orbits of many comets there and causing some to fall toward Earth.
These occasional comet showers could be why the mass extinctions on Earth are so regular, some scientists believe.

The research appeared in the online edition of the journal Icarus.
'Most planetary scientists would not be surprised if the largest undiscovered companion was Neptune-sized or smaller, but a Jupiter-mass object would be a surprise,' Matese told SPACE.com
'If the conjecture is indeed true, the important implications would relate to how it got there — touching on the early solar environment — and how it might have affected the subsequent distributions of comets and, to a lesser extent, the known planets.'

http://www.dailymail.co.uk/sciencetech/article-1336540/Massive-dark-object-lurking-edge-solar-hurling-comets-Earth.html

太陽系邊緣或潛伏巨型暗天體 向地球抛射彗星
http://www.sina.com.cn
2010年12月09日 07:30
新浪科技

新浪科技訊北京時間12月9日消息,美國科學家表示太陽系的邊緣可能“潛伏”著一顆巨大的暗天體。絕大多數飛入太陽系內部的彗星似乎都來自奧爾特雲外部區域。這個區域由太陽系誕生時遺留下的冰塵和碎片構成。奧爾特雲開始於距離太陽大約930億英里(約合1496億公里)的一個點,向外延伸3光年,內有數十億顆彗星,其中絕大多數體積較少並且處於一種隱藏狀態。

美國科學家最新進行的計算顯示,一個體積相當於4顆木星的巨型天體可能向地球“投擲”彗星。科學家對奧爾特雲內的彗星進行了分析。根據他們的推斷,25%的彗星在改變軌道前需要獲得一顆大型天體的助推,這個天體的體積應至少與木星相當。

這一理論由美國路易斯安那州大學天體物理學家約翰·馬蒂斯和丹尼爾·惠特邁爾提出。他們表示:“一個質量低於木星的天體無法做到這一點。”他們認為太陽系擁有一個隱藏的“伴侶”,迄今為止尚未被觀測到。

借助於美國宇航局的紅外太空望遠鏡——廣域紅外探測器(以下簡稱WISE),兩位科學家對奧爾特雲進行了研究。這架望遠鏡能夠探測到暗天體。馬蒂斯表示:“我認為這個問題可以在5到10年內解決,因為相關觀測正在進行,我們當前的彗星樣本將變得黯然失色。彗星來源方向是否存在不對稱性,是否可以通過觀測解答這個疑問?我們認為WISE的觀測發現將最終推翻或者驗證我們的推斷。”

已知長周期彗星數量為3200顆左右,其中最著名的非Hale-Bopp彗星莫屬。 1996年至1997年,我們甚至可以用肉眼觀察到這顆彗星。哈雷彗星大約每75年出現一次,它是一顆短週期彗星,來自於太陽系的柯伊伯帶。

研究人員表示,如果這顆暗天體確實存在,這顆新行星應該溫度極低,很難被觀測到。它與太陽之間的距離可達到3萬個天文單位。一個天文單位相當於地球與太陽之間的距離,大約在9300萬英里(約合1.5億公里)左右。

一些科學家認為可能存在一顆隱藏的恆星,被他們稱之為“復仇女神”,與太陽之間的距離為1光年。他們指出這顆恆星在沿軌道運行時會進入奧爾特雲,它侵入很多彗星的軌道,導致一些彗星脫軌並飛向地球。一些科學家相信,偶爾出現的彗星雨是地球上經常出現物種大滅絕的原因。

馬蒂斯和惠特邁爾的研究發現刊登在《伊卡洛斯》雜誌網絡版。馬蒂斯在接受美國太空網採訪時表示:“如果這個尚未被發現的最大伴侶體積相當於海王星或者更小,絕大多數行星科學家都不會感到驚訝,但如果質量相當於木星,情況就不一樣了。如果這一推測是正確的,我們就要面臨一系列重要疑問,即它如何來到現在的位置——涉及到早期太陽環境——同時又會對後來的彗星分佈和已知行星產生什麼影響?” (孝文)
http://tech.sina.com.cn/d/2010-12-09/07304961915.shtml

Nibiru?? 新行星被發現 - 四倍木星大小!

先知們、行星和物理學家對加州地震連成一線

警報CNN新聞-2011-Niburu真的是行星-X-復仇女神 向著我們投擲彗星

復仇女神:死亡之星

搜索死亡之星 它向地球擲出致命彗星


沒有留言: