🌡Sun = 🌡Earth's core (Approx.)? Yes

🌡Sun = 🌡Earth's core (Approx.)? Yes

According to current research, the temperature of Earth's inner core is approximately 5,700 K (that's 5,430°C or 9,806°F). And believe it or not, this is about the same temperature as the surface of the Sun!

As the Earth cools from the inside out, the molten outer core is slowly freezing. This is leading the solid inner core to grow at a rate of approximately 1 millimeter per year.

If Earth survives the death of the sun it will take 91 billion years for the core to solidify and 10's of billions of years more for the Earth to cool to the background temperature of deep space. An object as large as a planet has to allow for the escape of heat from such a large mass.

The Earth's core is cooling down very slowly over time. ... The whole core was molten back when the Earth was first formed, about 4.5 billion years ago. Since then, the Earth has gradually been cooling down, losing its heat to space. As it cooled, the solid inner core formed, and it's been growing in size ever since.

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