Science

syzygy

by Chris Stewart & Emily Brunsden

AstronomySciencePhysics

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Latest episodes

s3e5: Signals Through Silence

October 15, 2026 · 53 min

We've talked a lot about life in the universe in this season — from where we might look, to what it might conceivably be, to the question of what even we mean by the word "life" anyway. And now, finally, it's time to grapple with the huge…
s3e4: What IS Life, Anyway?

January 28, 2026 · 1 hr 14 min

Finaly — finally! — Chris and Emily get to the meat of the matter in this season on life in the universe. Very special guest Dr Kelly Redeker from the Department of Biology at the University of York breaks down the principles of life, both…
s3e3: Solar System Sanctuaries

December 4, 2025 · 1 hr 12 min

In this season on life in the universe, it's time to look closer to home: what are the chances we will find evidence of life — present or past-tense — in the Solar System, our own back yard? Emily's fabulous colleague Dr Clément Moissard…
s3e2: Habitats in the Void

November 19, 2025 · 1 hr 1 min

Having established that the hunt for life in the galaxy ought to begin with an appropriate star, Emily turns our attention towards suitable planets. But what makes a hospitable home for life? It’s complicated, and it seems whatever way we…
s3e1: First, You Need Light

October 31, 2025 · 1 hr 2 min

We're back with Season 3! For the next six episodes we're talking life in the universe, and so far we have N=1: we know there's life on Earth, but nowhere else as yet. Those are challenging statistics. In this episode Emily makes the case…

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s2e6: Experimental Extraterrestrial Exo-Observatory

March 8, 2025 · 50 min

According to one survey, around one-third of Australians think aliens not only exist, but have actually visited Earth. That's ... a bit fraction. In this final episode of season 2, we ask how we'd even find out if life exists around other…
s2e5: Exotelescope Expeditions

January 17, 2025 · 57 min

Exo-planets, sure. Exo-moons and -comets? Fine. But exo ... telescopes?! Emily is going out on a limb in this episode, expanding the definition of telescope to include things that measure stuff in space, and we're here for it! Which means…
s2e4: Exoplanet Extrapolation

January 3, 2025 · 50 min

We know, we know — we did exoplanets last time. But that was the current state-of-play and a 2024 exoplanets wrapped update. In this episode, Emily looks to the future! She does a deep dive into the promise of the just wonderful JWST, as…
s2e3: Exoplanets ExoWrapped

December 19, 2024 · 57 min

It couldn't be a season of exo-stuff without taking a good hard look at the current state of exoplanets, the OG exo-thing. Emily sums up the state of exoplanet research in 2024 — her Exoplanets 2024 Wrapped, if you like — then lines up her…
s2e2: Exocomet Excitation

November 28, 2024 · 58 min

Exoplanets, sure. Exo-moons too, apparently. But exo ... comets?! Yes indeed, they're a real thing, and we've known about them for ages! How do you spot something so tiny around another star, so far away? Emily has the insider knowledge…
s2e1: Exomoon Expectation

November 13, 2024 · 56 min

Way, way back in the early epochs of Syzygy (ep 19 in Oct 2018 if you must know) we talked about the exciting prospect of spotting the first exomoon — a moon orbiting a planet orbiting a star that is not our own. It seemed reasonable to…
Introducing Syzygy Season Two!

November 8, 2024 · 2 min

A short announcement: Syzygy is now seasonal! From now on we're going to release the podcast in seasons, and we're excited to announce the imminent release of the first episode of Syzygy Season Two. Yep. Two. Season One is everything we've…