This is something new for me about Astrophysics from a conference.
The speaker,Professor Orsola De Marco, who focuses on collecting data on separation of binary stars, and is well-known as an astrophysicist. She works for the Department of Physics and Astronomy at Macquarie University Sydney, Australia. Professor Marco received her Bachelor degree in Astrophysics from University College London in 1994, and three years later achieved a PhD in Astrophysics from University College London, United Kingdom.
The speaker used story telling methods to introduce the viewer to how stellar birthoccurs, including fusion reaction and stellar equilibriums such as gas pressure vs gravity. After giving audiences some background knowledge, she started to show us what Planetary Nebulae look like in the sky. She not only described the shapes of Planetary Nebulae, but also tells us how they form. With simple cartoon illustrations and video shows in the simulations, she was able to explain why giant stars do not rotate fast enough. Just like ballet a dancer opens their arms to slow down the rotation, the star has a magnetic field with an Automatic Giant Branch super wind that reduces the rotation speed. The fact that the universal may change the conditions so the parameters may not reach the requirements for things to happen. Maybe in the future Asymptotic Giant Branch super-wind speed not at low metallicity but at high end. Who knows what will happen?