< p >是的,地球的年龄约为45亿年(45亿年)。你的链接的文章描述了< a href = " //www.hoelymoley.com/questions/4362/how-was-the-earth-formed?rq = 1 " >如何成立< / >,我们如何知道。不确定性是低于1%,部分取决于同位素年龄测定方法和在一定程度上定义。有时,年龄是4.567 < a href = " https://en.wikipedia.org/wiki/Billion_years " rel = " noreferrer " > Ga < / >,这可能是太确切数字,但至少很容易记住。< / p > < p >我没听过任何科学建立不同年龄的限制,但在我们访问方法和数据我们有今天,有一个广泛的估计。< / p > < p >初步估计是基于所谓的< a href = " http://apps.usd.edu/esci/creation/age/content/failed_scientific_clocks/ocean_salinity.html " rel = " noreferrer " >增加海洋的盐度< / >,但这些估计未能认识到盐也从海水在俯冲带,形成< a href = " https://en.wikipedia.org/wiki/Evaporite " rel = " noreferrer " >蒸发岩< / >。< / p > < p >值得注意的是< a href = " https://en.wikipedia.org/wiki/William_Thomson _1st_Baron_Kelvin # Age_of_the_Earth: _geology_and_theology”rel = " noreferrer " >开尔文勋爵的< / >非常明智的估计20 - 40几百万年了,第一次是在1863年出版。估计是基于热损失自地球形成和保留其能源的能力。不幸的是,开尔文勋爵曾过早知道E = mc ^ 2美元,所以能源也是地球内产生热量的主要来源。他还不懂太阳的< a href = " http://onlinelibrary.wiley.com/doi/10.1029/2000JB900028/pdf " rel = " noreferrer " >的能源和对流< / >,因此错误太阳年龄的约束和地球的热通量。 Radioactive decay is not only the source of heat but also the process we use to measure the age by radiometric methods. These methods became known decades later and quickly provided age constraints sin the right magnitude.
Earth scientists have assumed the deep time age of Earth since the antiques. It must have been frustrating for the early geologists to not be able to put a number of the Earth's age. As a rudiment of that time, we still use their relative terminology to describe the development.
Our present estimate is based on a range of agreeing models and data. The Earth science community has, in general, moved on to new and more challenging questions.