We never enter into new recording projects thinking, “Yeah we’re gonna write something great here!” A lot of the time it’s a feeling like, can we write anything else? Is there anything else to say? You know what I mean? There’ll always be things to say, but if we can’t dress it up right, then it’s game over. It feels like a pretty honest place to start from: What is there to say?

Well, it’s very simple for me. It’s pretty much always the same. I might have certain things swimming around in my head. We all always do. What’s been on your mind lately? You could ask anybody that, and you’d get a couple of answers. But, I always jump in. I always just try to think of a first sentence. Well, actually, I decide firstly if it’s going to be in third person or first person. And then I just think of something, I just get something moving.

I can’t say there’s a specific place to begin when it comes to creating virtual identities, but it’s important to consider them in the longview. What stays here—in web pages, caches, and hard drives—might be the things that people retain of you in the future ahead. Where scholars might spend years studying the journals and letters of our predecessors, these personal accounts are infinitely more robust. Even if it is a private pursuit, an external drive full of personal exploration can be such a gift to those not here yet.

I usually start with a structure. The structure is quite rigid. So I have a strong form or frame. A work like Einstein on the Beach is like that: Act One, Two, Three, Four. Act One is A and B. Act Two is C and A. Act Three is B and C. And Act Four is all three together, A, B, and C. So, I knew it was going to be based on theme and variation, and once I get that, I can be freer to fill in the form. Without it, I don’t know how to fill it in – it’s like an architect builds an apartment building: you can live in the building, I can live in the building, other people can live in the building. They each have their apartment to their own liking, but the building has a cohesion because the architect has built it.

It looked like an agricultural frame, something you might grow peas up – a lot of wires and cables strung from posts over a space the size of 57 tennis courts. It was actually built to study radio emission from quasars. I built the prototype and then six of us took two years to build the real thing.

I was really proud that it was my stars that had convinced the prize committee that there was good physics in astrophysics.

Yes, in 2018, I was awarded the Breakthrough Prize for the discovery. I was a bit dumbstruck, never expecting that kind of thing to happen. I was keen that the money should be used well and the best way to do that seemed to be to encourage a more diverse research student population from under-represented groups.

The next generation of telescopes will see millions of events per night with computers that sift through huge amounts of data. If we had had access to a computer, we would never have programmed it to look for something so unexpected. How do you pick up the things you don't know exist, the things you can't tell it to look for? My project was to study quasars, and then we accidentally stumble over these things called pulsars. They were totally unexpected, totally unknown – and it's been huge fun.

Occasionally there would be something I didn’t recognise and I’d record it with a question mark or, as a joke, LGM for Little Green Men. It was easier than saying “you know that funny pulsing source at right ascension 1919, declination plus 20”. So, it became LGM.

I was very, very thorough, making sure I really understood how that telescope worked, and that it was working properly. I was quite convinced that I wasn't clever enough to be in Cambridge and would be thrown out at some stage. My policy was to work as hard as I could so that I'd know I'd done my best. We now label this as impostor syndrome, but we didn't recognise, and certainly didn't name it, back then.