Posts Tagged ‘earth´s core’

Núcleo da Terra: O que a Ciência Acadêmica sabe de fato? De fato, nada, mas tem evidencias para boa teoria.

Wednesday, January 27th, 2021

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Why is the earth’s core so hot? And how do scientists measure its temperature?

Quentin Williams, associate professor of earth sciences at the University of California at Santa Cruz offers this explanation

  • October 6, 1997

https://www.scientificamerican.com/article/why-is-the-earths-core-so/

Why is the earth's core so hot? And how do scientists measure its temperature?
Credit: Getty Images

” How do we know the temperature? The answer is that we really don’t — at least not with great certainty or precision. The center of the earth lies 6,400 kilometers (4,000 miles) beneath our feet, but the deepest that it has ever been possible to drill to make direct measurements of temperature (or other physical quantities) is just about 10 kilometers (six miles). Ironically, the core of the earth is by far less accessible more inaccessible to direct probing than would be the surface of Pluto. Not only do we not have the technology to “go to the core,” but it is not at all clear how it will ever be possible to do so. “