The iron core of the Earth does not melt. It is extremely hot, with temperatures reaching up to 5,700 degrees Celsius (10,232 degrees Fahrenheit), but it remains solid due to the immense pressure exerted by the overlying layers of the Earth. The pressure at the center of the Earth is estimated to be around 3.6 million atmospheres, which is more than 3.6 million times the pressure at sea level. This pressure prevents the iron atoms in the core from moving freely and forming a liquid.