But we've never been to the planet's core. We haven't even come close. The central point of the Earth is over 6,000km down, and even the outermost part of the core is nearly 3,000 km below our feet, and it’s impossible because the outer core consists of liquid metals, but the inner core is solid. This is due to the increase in pressure from the outer to inner core. The inner core has so much pressure acting on it that its molecules are squeezed together very tightly. structure of Earth without having to travel to the center of it.
