PBS Space Time - Season 2018 (2018)

We can now map the interiors of stars by “listening” to their harmonies as they vibrate with seismic waves.

Learn about Horizon radiation and why it's essential for us to understand as we continue our journey towards the Unruh Effect and Hawking Radiation.

The Sun is slowly burning through its fuel. Hydrogen is fused into helium in the Sun’s core, producing energy that keeps it shining, and keeping the Earth warm and hospitable to life. But that fuel WILL run out, after which the Sun will swell into a red giant and flash-fry the Earth. But in fact that frying – well, slow-roasting – will begin much earlier. See, the Sun is getting brighter even now. This has complex, and for the most part terrible implications for life. The end of the world will come sooner than you think.

What happens when a star eats its planets? Find out on today’s Space Time Journal Club.

Energy is the most powerful and useful concept in all of physics, but what exactly is it?