What can possibly replace the singularity? What are Planck stars and Gravastars? What’s it like to fall into a rotating black hole?

What can possibly replace the singularity? What are Planck stars and Gravastars? What’s it like to fall into a rotating black hole?
This week we have moist exoplanet atmospheres, possibility of life arise on a massive planet, the shape of a black hole singularity, and many more. #spaceradio with @PaulMattSutter #365DaysOfAstro
An asteroid that changes color!
Why does a black hole end in a singularity? How can we measure distances to stuff in space?