Emily, do you remember when One Direction called it a day?

I think you'll find there are still many people who can't talk about it.

Well luckily, we can. A lot.

Because our new season of terribly famous is all about the first One Directioner to go it alone.

Zayn Malik.

We'll take you on Zayn's journey from Shylad from Bradford

to being in the world's biggest boy band and explore why.

When you reach the top, he decided to walk away.

Follow terribly famous wherever you get your podcast.

This is CBS Eye in the World. I'm John Batch with Gouverne Schilling,

an astronomer, chronicler, who is taking us into the part of astronomy

that is the most confounding and tempting to astronomers, to cosmologists,

to people who read Gouverne's book.

We're looking for something that we can't see, we've never found,

and we're going to try to imagine how we can certify it exists.

We need theories wonderful, but how do we certify it?

Now we come to Jeremiah Osterker, who thanks to Gouverne,

I've been led to his book Heart of Darkness published in a few years ago.

He's an astronomer with firm ideas.

And one of those firm ideas is to picture again what we can't see.

It's called the halo effect around our galaxy,

the Milky Way around all galaxies. What is that? How should we picture it?

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