What on Earth?!
What On Earth?! is a podcast about the planet we live on - and the many questions it raises. From fossils and volcanoes to rocks, landscapes, and the forces shaping Earth beneath our feet, each episode breaks down an Earth science topic in a clear and engaging way.
No prior knowledge required: we focus on the ideas, stories, and discoveries that help you understand how Earth works and why it matters. If you’ve ever looked at a rock, a map, or the ground beneath you and thought “what on Earth is going on here?” - this podcast is for you.
What on Earth?!
What on Earth is the Solar System?! Part 1
Use Left/Right to seek, Home/End to jump to start or end. Hold shift to jump forward or backward.
Please remember to follow, like and share!
Instagram: https://www.instagram.com/whatonearth_podcast?igsh=Y3MwbjkyNjgwcjVy
Facebook: https://www.facebook.com/share/1Fa7FsnQku/
In our fourth episode of What on Earth, we zoom way out - from rocks beneath our feet to the vast, dynamic system we call home: the Solar System.
We start with a deceptively simple question: what on Earth is the Solar System? From there, we unpack what actually defines it - not just planets orbiting the Sun, but a complex, evolving system shaped by gravity, heat, collisions, and time.
We talk about where our knowledge of the Solar System comes from: meteorites as time capsules of early planetary material, the Moon as a natural laboratory, telescopes on Earth and in space, and numerical models that let us replay cosmic chaos. It turns out we don’t need to travel everywhere to understand space -sometimes the clues fall right into our hands.
From there, we dive into how the Sun was born inside a stellar nursery, how protoplanetary disks form, and why the Solar System ended up so clearly divided into rocky inner planets and distant gas and ice giants. Temperature gradients, collisions, and violent early conditions play a much bigger role than peaceful orbits might suggest.
We also explore our Sun itself: what kind of star it is, how it produces energy, why it has layers like an onion (or an ogre), and how solar activity - from sunspots to solar wind - shapes the space far beyond the planets. Along the way, we follow the solar wind all the way to the edge of the Sun’s influence, where spacecraft like Voyager have shown us just how big our cosmic neighbourhood really is.