《中英對照讀新聞》Scientists have found out the origin of traces of water on Mars 科學家已發現火星上水痕的起源


2017-07-31 06:00

◎ 劉宜庭

Traces of water on the surface of Mars, found in recent years by NASA satellites, arose due to the melting of ice on the edges of large Martian craters after the fall of meteorites, according to an article published in the journal Geophysical Research Letters.

根據一篇刊登在「地球物理研究通訊」期刊的文章,美國國家航太總署的衛星近年來發現,火星表面的水痕肇因於隕石墜落後,在大型火星隕石坑邊緣所融化的冰。

Scientists have found many hints that on Mars in ancient times there were rivers, lakes and entire oceans, comparable to our Arctic.

科學家們已發現許多線索,顯示古火星可能擁有河、湖和整個海洋,可和我們的北極圈比擬。

Many scientists to wonder how liquid water got to Mars and how it could have survived long enough to form a network of shallow but branched channels on the crater slopes.

許多科學家想知道液態水怎麼出現在火星,又怎麼能存在如此之久,以至於在隕石坑的邊緣形成淺而縱橫的水道。

David Weiss’s team noticed that all the channels and valleys of the "freshest" rivers are located where the melted fragments of soil and rocks that were thrown out when the asteroid collided with the surface of Mars were to fall.

韋斯的研究團隊注意到,所有「最新鮮」的河道和河谷,都位於小行星和火星表面相撞時,被拋出的土壤及岩石的熔化碎片。

As the calculations of geologists have shown, this heat should be enough to melt the significant reserves of ice under the surface of Mars and get enough water that can pierce these channels.

地質學家的計算顯示,(小行星和火星表面相撞的)熱量應該足以溶化火星表面底下的大量儲冰,獲得足夠充盈這些水道的(液態)水。

新聞辭典

Martian:形容詞,火星的。例句:Water vapor has been detected in the martian atmosphere.(火星的大氣層裡,已檢測出水蒸氣。)

crater:名詞,隕石坑、火山口。例句:This crater (Lio)is a giant hollow with a diameter of 225 kilometers and a depth of about seven kilometers.(這隕石坑「里歐」是一個直徑225公里、深度約7公里的巨大凹洞。)

asteroid:名詞,小行星。例句:This crater (Lio) arose as a result of the fall of a large asteroid from 1.6 billion to three billion years ago.(這隕石坑「里歐」的出現,是16億年至30億年前,一顆巨大的小行星墜落的結果。)

  • 根據一篇刊登在「地球物理研究通訊」期刊的文章,美國國家航太總署的衛星近年來發現,火星表面的水痕肇因於隕石墜落後,在大型火星隕石坑邊緣所融化的冰。(法新社資料照)

    根據一篇刊登在「地球物理研究通訊」期刊的文章,美國國家航太總署的衛星近年來發現,火星表面的水痕肇因於隕石墜落後,在大型火星隕石坑邊緣所融化的冰。(法新社資料照)