联系我们
月河路店:杭州市月河路888号
联系电话:0571-87654321
联系人:徐小姐
解放路店:杭州市解放路888号
联系电话:0571-87654322
联系人:王小姐
加盟热线:0571-12345678
加盟热线:0571-22345678
点评详情
 
商品搜索
当前位置
点评详情
发布于:2020-7-24 07:06:23  访问:97 次 回复:0 篇
版主管理 | 推荐 | 删除 | 删除并扣分
Extinct `extra-terrestrial Equivalent Of The Rhine` Spotted On Mars
Astronomers have uncovered the first evidence ever of a river on Mars which flowed across the red planet for more than 100,000 years.  
Permanent marks left behind in exposed cliff faces more than 650ft (200m) high reveal the river was a deep, fast-flowing torrent of water which existed year-round. 
It proves Mars had abundant liquid water and a stable atmosphere capable of supporting life around 3.7billion years ago, 토렌트 인기 순위 when the solar system was in its infancy. 
Researchers from the University of Utrecht looked at high-resolution images from orbiters circling the planet and found evidence of the river.
It is believed the river was constantly shifting and creating sandbanks similar to the Rhine, or other rivers in Northern Italy.  
Pictured, high resolution imaging science experiment (HiRISE) and contour lines. This shows the slope of the cliff which is around 200m high (650ft) 
Pictured, a topographic map taken of the surface of Mars from Mars Orbiter Laser Altimeter (MOLA). The red square is the outcrop of cliff analysed in the study which revealed the presence of an ancient river 
The large cliff face, located at a place called at Izola Mensa in the northwestern rim of the Hellas Basin in Mars`s southern hemisphere, painted the picture of the river. 
Soft sedimentary rocks were scrutinised in detail, with advanced imagery on the satellites providing resolution of up to an inch (25cm) per pixel. 
Marks in the rock are identical to those seen on Earth when water flows past rock for long periods of time. 
Due to the age of the cliffs the astronomers are unable to predict how long the river would have been, saying erosion makes the current surface vastly different to the one that existed more than three billion years ago. 
Dr Francesco Salese, who led the research, says analysing the marks in the rock was easy with the correct technology, but quips that it wasn`t quite as simple as `reading a newspaper`. 
`The extremely high resolution imagery allowed us to "read" the rocks as if you are standing very close to the cliff,` he adds. 
`Unfortunately we don`t have the ability to climb, to look at the finer-scale details, but the striking similarities to sedimentary rocks on Earth leaves very little to the imagination.` 
RELATED ARTICLES
Previous
1
Next
Most explosive `meteor impact` on record - known as the... Billions of people around the world could experience `nearly... Alien life might survive on more planets than previously... Chunk of moon rock weighing nearly 30lbs that was blasted...
Share this article
Share
86 shares
Pictured, in the black square is the cliff face section scrutinised by the astronomers. It revealed permanent marks left behind in the sedimentary rock which tells the story of a now-extinct river which flowed across the red planet for more than 100,000 years around 3.7billion years ago 
The study proves Mars had abundant liquid water and a stable atmosphere capable of supporting life around 3.7billion years ago, when the solar system was in its infancy (file photo)
共0篇回复 每页10篇 页次:1/1
共0篇回复 每页10篇 页次:1/1
我要回复
回复内容
验 证 码
看不清?更换一张
匿名发表 
脚注信息
版权所有 Copyright(C)2009-2010 杭州市某某美容会所智能建站