We love it any time a listener gets in touch — but the *best* is when a listener suggests a topic for an episode of the podcast. So when Zofia Szczesna got in touch (through the Syzygy website, natch) and asked about white dwarf stars, Emily put her research hat on and dug into the amazing astrophysics of these amazing little entities. In this episode she lists her three favourite things about white dwarfs: a cheeky supernova loophole, wibbly-wobbliness, and our white dwarf (or more accurately, black dwarf) future.

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Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• Osiris Rex’s recent little problem

• White dwarf stars

• Degenerate electrons and neutrons

• The Chandrasekhar limit

• Types of supernovae

• Variable stars

• Proton decay

• Black Dwarfs

JWST is flinging out Just Wonderful observations at great speed, many already leading to new astronomical insights. Here's one that was really unexpected: the Orion Nebula is full of JuMBOs! Jupiter-Mass Binary Objects, that is — pairs of giant planets (or planetty-things, the definition isn't terribly clear ...) floating free in space, in quantities that aren't possible based on what we *thought* we understood about planet formation. New observations that seem to break astrophysics? We're always up for that discussion!

Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod

Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• The Fibonacci Sequence

• The JuMBOs papers: overview, and JuMBO-specific

• The Orion Nebula

• JWST gets a good look at the Orion Nebula

• Where is the Orion Nebula, exactly?

• The definition of “planet"

Earth got a special delivery recently: a little pod plonked down in the Utah desert, containing a few hundred grams sampled from the surface of an asteroid. This isn't the first sample return mission, but it's definitely the biggest. The little parcel of asteroid dirt inside is now being very carefully handed out to researchers across the globe, and we're going to learn loads of important stuff, like what asteroids are made of, how we might stop one from hitting us ... and even, maybe, just maybe, whether they contain the building blocks of life.

Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod

Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• The OSIRIS-REx mission

• Landing in the desert (NASA video stream)

• Grabbing the sample in 2020

• Sample return missions

• Asteroid Bennu

• OSIRIS-APEX

• Asteroid Apophis

• The Asteroid Belt

It’s always nerve-wracking waiting for a very expensive new space telescope to launch — the whole mission can literally end in a highly explosive blink of an eye. Fortunately for the Euclid mission team, their gleaming new spacecraft left the Earth in one piece, and made its way to L2 to begin it's new job. It’s mission? Oh, just to solve five huge mysteries of the universe, from the nature of dark matter and dark energy, to unravelling the threads of the cosmic web.

Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod

Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• Telescopes up a mountain in Hawaii

• The Euclid Mission website

• The Launch!

• Euclid’s Big Five

• Streaming data from L2

• Euclid’s first test images

• Dark Matter & Dark Energy

• The Cosmic Web

• Fly-through of the Cosmic Web

Every so often, a Syzygy listener writes in with a cracking question that sends Emily and Chris off spelunking down the deep, deep sinkholes of astronomy and cosmology. This time, listener Eve asked an absolute cracker, to wit: Just how much energy is there in the universe right now? A simple question at first glance. At second glance (and every glance thereafter) it's not simple at all. We need to first consider, what is energy? What is the universe? And even, what is "now"? It's very confusing.

Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod

Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• Feynman’s discussion of energy

• Dark matter

• Dark energy

• The observable universe

• Critical energy density

• Is the energy in the universe zero?

• The Big Bang Singularity

• The fates of the universe

Everyone's favourite bonkers red giant is back in the news again, and it has the supernova spotters in a froth. Last time we talked about Betelgeuse, it had gone unusually dim. Never fear, it's back with a vengeance — not just brighter, but pulsing twice as fast! Is the end nigh? Can we expect it to go boom soon? Well ... define 'soon'. Emily has all the answers.

Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod

Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• The Betelgeuse paper

• A good article on what’s going on with Betelgeuse

• The Great Dimming

• The brightest stars in the sky

• Indigenous peoples have known about variable stars for a very long time

• Could we spot a supernova coming?

Astronomers have spotted what seems to be a supermassive black hole devouring a huge gas cloud — and in the media it's being claimed as the Biggest Explosion in the History of Explosions. Except, is it though? And didn't we already talk about this, way back in Episode 61? And anyway, what does "biggest" even mean? Or "explosion", for that matter? Or "time"? It's all very confusing. Emily's here to make sense of it all.Syzygy Merch! Get it at the store.

Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod

Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• The research paper

• A good article about the story

• The OG Episode 61: Biggest Bang Eva!

• Energy units, including ergs and joules

• Gamma Ray Bursts

• The Gamma Ray Burst of 2022

• BOATS (and GOATS)

• Vale D Alexander Kann

Like many of us, as some stars get older, they get bigger. Like, really big. Big enough to swallow up any planets orbiting near by. Astronomers have known this for a while now, but they'd never actually seen it happen ... until now. Emily explains what's going on, what's been observed, why a planet-gobbling star seems the only real explanation, and what it all means for the Earth's distant future.

Syzygy Merch! Get it at the store.

Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod

Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• The original paper by De et al

• A good article about the research https://time.com/6276702/star-eating-a-planet/

• The Zwicky Transient Facility https://www.ztf.caltech.edu

• NASA's NEOWISE telescope https://neowise.ipac.caltech.edu

• Really big stars

• Comet Shoemaker-Levy-9

In 2023, the Moon is where it’s at — so many rockets taking so many little orbiters and landers and rovers and boxes full of weird trinkets ... just in the coming few months! And that’s before you even count the missions aimed at pushing human footprints into the lunar dust for the first time since the early 70s. Everyone and their dog is sending stuff to the moon, and Emily is here with all the details of six missions set to launch in the coming Northern Spring-Summer launch season.

Syzygy Merch! Get it at the store.

Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod

Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• Missions to the Moon — past, present and future

• JUICE

• Astrobiotic’s Mission One

• The Lunar X Prize

• Intuitive Machine’s IM-1 mission

• Chandrayaan 3

• Luna 25

• JAXA’s SLIM

• The Artemis program

The biggest black hole ever has been found — not supermassive, but *ultra*massive. Emily takes Chris on a tour of all the types of black hole, from the speculative minis, through the solar and intermediate mass kinds, to the stonking supermassive and frankly ludicrous ultramassive. And we ask, how exactly do you see a black hole when it's ... you know ... black?

Syzygy Merch! Get it at the store.

Help us make Syzygy even better! Tell your friends and give us a review, or show your support on Patreon: patreon.com/syzygypod

Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

On the web: syzygy.fm | Twitter: @syzygypod

Things we talk about in this episode:

• The ultramassive black hole paper

• Article about the research

• Mini black holes

• Will the LHC destroy the Earth?

• Stellar mass black holes

• Intermediate mass black holes

• LIGO and Black hole mergers

• Supermassive black holes

• That black hole photo

• Squeezars

• The biggest black holes

• Hubble Space Telescope

• Gravitational lensing

• Euclid, LSST and the SKA