编辑-地球科学江南体育网页版堆栈交换江南电子竞技平台

你不是登录。你的编辑将被放置在一个队列,直到同行评议。

我们欢迎编辑,使读者更容易理解和更有价值。因为社区成员审查编辑,请尽量使文章更好比你怎么发现,例如,通过修正语法或添加额外的资源和超链接。

牧师

是月球地质证据,一旦与地球相撞?

我看到月系统模型在天文学中,展示一定碰撞后走到一起。然而,我没有听到地球上是否有任何实际的实物证据指向之前的碰撞。有在地球上地质(或其他物质)的证据,证实了月球起源于地球上的碰撞吗?如果证据是什么?

回答

>有地质(或其他物质)在地球上的证据,证实了月球一旦与地球相撞?不,没有。这是,然而,大量的证据表明,月球形成由于碰撞三分之一的身体(有时称为忒伊亚)与地球和月球形成的环碎片的撞击造成的。这一理论通常被称为*(大碰撞假说)[1]*和搜索这个词可能会帮助你找到其他的链接和引用。>如果证据是什么?总结地质证据,这是* * * *间接证据,因为它比较月球地质学与地球上类似的地质或特性,并将结论解释的相似性(或差异)。由于规模的影响,它可能会重新配置完全两个身体的表面,所以找到直接物证在地球上是非常不可能的。隐藏(如一个巨大的陨石坑将不再存在)地质证据- - - - - - - - - - - - - - - - - - - - - - - - -从阿波罗任务收集的月球岩石,几乎相同的氧同位素比率类似岩石地球上发现相同的年龄。——月球地壳的很大一部分是由斜长岩,这是表明大量融化事件。(从影响的能源供应)-锌。 Lunar rocks contain less zinc, but with heavier *isotopes* of Zn than those found on Earth, which by contrast has lighter isotopes in greater abundance. This is consistent with zinc being depleted from the moon by evaporation, such as during a massive impact event. - Density and volatiles. The Moon is 25% less dense than the uncompressed density of Earth. It is severely depleted in volatiles, with practically no water and less than half the potassium abundance that Earth has. The combination of low density and lack of volatiles implies that the Moon was not a simple accretion of early solar system material, but resembles the Earth's mantle in bulk composition. Volatile material would have been vapourised by the impact. - The bulk composition of the Moon's crust. (This one does not actually involve the Earth, but I feel it is still important to mention.) The Moon's mantle and crust chemical composition *could* be explained if the Moon had a large iron core, but its core is actually quite small. Other Physical Evidence ----------------------- - The ratio of the Earth and Moon's mass far exceeds any other planet in the solar system, and this begs the question of how did so much material become in orbit of the Earth. (Not evidence as such, but raises the question in the first place) - Getting more indirect...there are bands of warm silica-rich dust orbiting nearby stars which is interpreted as planet-sized bodies having collided with each other, so there is precedent for similar events happening elsewhere in the galaxy. (Again, I realise this is one is not strictly answering the question, but Earth Scientists often have to look well outside the Earth to answer their questions!) Hope this gets you started! **Update:** I recently came across [this short article][2], which provides a summary of some of the latest thinking on the Moon's formation, including the Giant Impact Hypothesis. *Sources: [de Pater and Lissauer (2010): Planetary Sciences][3]; [Canup and Asphaug (2001), Nature][4]* [1]: http://en.wikipedia.org/wiki/Giant_impact_hypothesis [2]: http://www.ox.ac.uk/news/science-blog/where-did-moon-come [3]: http://books.google.co.uk/books/about/Planetary_Sciences.html?id=RaJdy3_VINQC [4]: http://www.es.ucsc.edu/~rcoe/eart206/canup_Moon_Nature_01.pdf

编辑总结

取消

添加一个评论 |

正确的小错误或错误
澄清的意思,而不更改它
添加相关资源或链接
总是尊重作者的意图
不使用编辑与作者回复

创建代码用引号”或式子~篱笆
' ' '
像这样
' ' '
添加语言标识符来突出显示的代码
”“python
def函数(foo):
打印(foo)
' ' '
把段落之间的回报
在结束linebreak添加2个空间
_italic_或* *的* *
报价将>开始的
做链接(尽量使用https)
< https://example.com >
(例子)(https://example.com)
< a href = " https://example.com " > < / >示例
MathJax方程罪\ \ ^ 2θ美元

格式帮助»
回答帮助»

MathJax帮助»