Abstract
We all agree – don’t we? – that we live on a planet that is broadly spherical and in orbit around a huge Sun, as do all the other planets, asteroids, minor planets and comets. Current evidence on the inner space of our planet indicates that its center is a solid ball of iron-nickel alloy with traces of other metals. The pressure at Earth’s core is about 22,000 tons per square inch and the temperature is about 10,000°F. Normally iron would boil at around 5200°F, but the intense pressure prevents this, and the inner core of Earth remains solid. This solid inner core is surrounded by a vast mass of molten metal composed predominantly of Iron. Between this liquid zone and the outer surface upon which we live are the mantle and crust, stratified layers of metallic and non-metallic chemical compounds.
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https://en.wikipedia.org/wiki/Counter-Earth#Scientific_analysis
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Kirby, G. (2018). Earth: Flat, Hollow or Inside Out?. In: Wacky and Wonderful Misconceptions About Our Universe. Astronomers' Universe. Springer, Cham. https://doi.org/10.1007/978-3-319-73022-6_4
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DOI: https://doi.org/10.1007/978-3-319-73022-6_4
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