Scientists discover fifth layer of Earth. It's a solid metallic ball
www.indiatoday.in
Researchers measured the speeds at which seismic waves penetrate and pass through Earth’s inner core.

At the center of the planet's core is another core - a 400-mile thick solid metallic ball.

  • Owl [he/him]
    ·
    2 years ago

    I've always wondered if there's a little hollow bit at the very center.

    There's no gravity there, so it always seemed like a 50/50 to me.

      • Owl [he/him]
        ·
        2 years ago

        Yes, the gravity adds up to 0 either way. Which means there's no force acting to compress that chunk of the earth, nor is there anything pushing it apart.

        Did whichever pile of space rocks that connglomerated into the Earth happen to be solid near the center?

    • fox [comrade/them]
      ·
      2 years ago

      There's no gravity because net acceleration in any direction is equal, but there's also a shitload of force because there's an entire planet surrounding the point that wants to occupy that point. Zero gravity but equal overwhelming pressure.