科学家外星系发现地球“双胞胎”或已有生命出现
研究者们最近在距离地球200光年的外星系中发现了地球的“双胞胎”。这颗被称为“KOI-314c”的行星，质量与地球相当，但是体积比地球大60%。这颗行星围绕一颗暗红色的小行星近距离运行，因此其表面温度高达104摄氏度，这个温度对于地球上的大部分生物来说都太高。
尽管科学家认为，在银河系中五分之一的恒星都有一个与地球相似的行星围绕其运行，但是天文学家们却从未找到另外一个与地球真正相似的世界，只有这颗“KOI-314C”行星最相似。
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行星“KOI-314C”的密度只比水高30%。这意味着它被厚达几百英里的氢气和氦气像毯子一样包裹着。来自哈佛大学史密森尼天体物理学中心的科学家认为，生命可能已经出现，在其大气受到来自恒星的强辐射而爆炸之前，这颗行星可能已经像一颗迷你海王星那样运行。
科学家发现行星“KOI-314C”使用的新技术被称为“过境时间变化”，这种技术仅适用于不止一个行星围绕着恒星转的时候。
英国《每日邮报》报道说，研究小组意外的发现了“KOI-314C”,当时他们正在集中精神观察开普勒数据,以寻找系外行星卫星，也即是系外卫星的迹象。而开普勒的主要任务不是找到行星，而是找到卫星。
现在媒体为了吸引眼球可以不要节操
这星球的环境比我们的邻居金星还有恶劣，能有生命才有鬼 不是围绕红矮星吗？怎么变成行星了 200光年的外星系!!!!! 幼儿园体育老师写的报道？ 先来帮顶一个{:soso_e182:} 温度这个高，很难产生和地球一样的生命 典型的三无帖子：
1、无来源
2、无根据，整篇文章错误连连，都无法读下去
3、为了骗取点击，无耻造谣。这种星球都会有生命，宇宙到处是生命了。 什么乱七八糟的 本帖最后由 人与自然 于 2014-1-13 23:41 编辑
gohomeman1 发表于 2014-1-13 20:43
典型的三无帖子：
1、无来源
2、无根据，整篇文章错误连连，都无法读下去
这是每日邮报的一篇报道，G版有兴趣的话，不妨看一看
http://www.dailymail.co.uk/sciencetech/article-2538549/Could-super-Earths-climate-like-Giant-worlds-huge-amounts-water-hidden-beneath-surface.html
Massive alien worlds, known as ‘super-Earths’, could be more like our own planet than first thought.
Scientists now suggest that tectonically active super-Earths store most of their water in the mantle- the rocky part that makes up most of the volume and mass of the planet.
If this model proves to be true, it could mean that our galaxy is home to giant worlds that have a stable climate similar to Earth with potential to harbour life.
http://i.dailymail.co.uk/i/pix/2014/01/13/article-2538549-1AA038CA00000578-956_634x380.jpgSuper-Earths are giant planets that have between one and 10 times the mass of our world. About 40 per cent of all red dwarf stars - the most common stars in our galaxy - have a super-Earth orbiting in the habitable zone
Super-Earths are giant planets that have between one and 10 times the mass of our world.
About 40 per cent of all red dwarf stars – the most common stars in our galaxy - have a super-Earth orbiting in the habitable zone where liquid water can exist on the surface of the planet.
Super-Earths are expected to have deep oceans that will overflow their basins and inundate the entire surface, but we show this logic to be flawed,’ said Nicolas Cowan, at Northwestern University in Illinois.
Terrestrial planets have significant amounts of water in their interior. Super-Earths are likely to have shallow oceans to go along with their shallow ocean basins.’
http://i.dailymail.co.uk/i/pix/2014/01/13/article-2538549-1AA038B800000578-70_634x565.jpgScientists suggest that tectonically active super-Earths store most of their water in the mantle- the rocky part that makes up most of the volume and mass of the planet. The mantle in this image is shown in orange, the crust is in red and the core in yellow
WHAT ARE SUPER-EARTHS?
Super-Earths are giant planets that have between one and 10times the mass of our world
About 40 per cent of all red dwarf stars – the most common stars in our galaxy - have a super-Earth orbiting inthe habitable zone where liquid water can exist on the surface of theplanet.
The first super-Earths were discovered by Aleksander Wolszczan and Dale Frail in 1992.
In April 2007, a team in Switzerland announced the discovery of two new super-Earths around Gliese 581.
Bothwereon the edge of the habitable zone around the star where liquid water may be possible on the surface.
In their model, the researchers treated the intriguing exoplanets like Earth, which has water in its mantle - the rocky part that makes up most of the volume and mass of the planet.
The rock of the mantle contains tiny amounts of water, which quickly adds up because the mantle is so large. Because of this, deep water cycle moves water between oceans and the mantle.
Water is constantly traded back and forth between the ocean and the rocky mantle because of plate tectonics, the researchers said. The division of water between ocean and mantle is controlled by seafloor pressure, which is proportional to gravity.
Accounting for the effects of seafloor pressure and high gravity are two novel factors in their model. As the size of the super-Earths increase, gravity and seafloor pressure also go up.
We can put 80 times more water on a super-Earth and still have its surface look like Earth,’ Professor Cowan said. ‘These massive planets have enormous seafloor pressure, and this force pushes water into the mantle.’
And it doesn’t take that much water to tip a planet into being a water world, the researchers said.
If Earth was one per cent water by mass, we’d all drown, regardless of the deep water cycle,’ Professor Cowan said.
http://i.dailymail.co.uk/i/pix/2014/01/13/article-2538549-1AA038CE00000578-340_634x359.jpgThe first super-Earths were discovered by Aleksander Wolszczan and Dale Frail in 1992. In April 2007, a team in Switzerland announced the discovery of two new super-Earths around Gliese 581 (pictured on the right)
The surface would be covered in water. Whether or not you have deep water cycle really matters for planets that are one one-thousandth or one ten-thousandth water.’
Professor Cowan admits that there are two major uncertainties in his model: that super-Earths have plate tectonics and the amount of water Earth stores in its mantle.
These are the two things we would like to know better to improve our model,’ he added. ‘Our model is a shot from the hip, but it’s an important step in advancing how we think about super-Earths.’
http://i.dailymail.co.uk/i/pix/2014/01/08/article-2535900-1A7EE7E500000578-642_634x456.jpgResearchers claim that Earth-sized planets can support life at least ten times further away from stars than previously thought
Last week, researchers in Scotland said that Earth-sized planets can support life at least ten times further away from stars than previously thought.
This means that cold rocky planets previously considered uninhabitable may be teeming with life beneath the surface.
Academics at the University of Aberdeen and University of St Andrews claim the definition of the ‘Goldilocks’ zone -the area of space around a star, or sun, which can support life – is flawed.They argue this definition fails to take into account life that can exist beneath a planet’s surface.
As you get deeper below a planet’s surface, the temperature increases, and once you get down to a temperature where liquid water can exist – life can exist there too,’ said Aberdeen University PhD student Sean McMahon.
In a galaxy of 200 billion stars of various types, scientists estimate there are 11 billion potentially habitable planets in the Goldilocks zone as it is currently defined.Factor in smaller, dimmer red dwarf stars, and the number of planets with mild temperatures similar to Earth rises to 40 billion. 人与自然 发表于 2014-1-13 23:36
这是每日邮报的一篇报道，G版有兴趣的话，不妨看一看
http://www.dailymail.co.uk/sciencetech/article-25 ...
你提供的文章与楼主所贴胡说八道的内容，毫不相干啊
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