Soundgarden win at Astrophysics - AWESOME ASTRONOMY

Transcript

A (0:00)

Once more round the sun, dear friends, once more. Happy New Year. Welcome to the second quarter of the 21st century. And despite the doom and gloom, we've actually done okay. I mean, if you look at the previous four centuries, then the great powers have always fallen to a massive and terrible war in the first 25 years. So well done, humanity. You broke that cycle. In fact, the people of the British Isles managed to start a new century without forming a new country again. Something that's happened in the first quarter of each of the previous four centuries. It was a close call on that one, but we did make it. Now, the next 25 years were a bit sticky in the last few centuries. Big wars, big revolutions, big moustache energy. But come on, people, we can do this. There is too much good science and astronomy out there waiting to be discovered for us to start dicking around with trivialities and egotism. Onwards to rationality and biscuits. I'm Paul.

B (0:52)

And I'm Jenny.

A (0:53)

And welcome to episode 165 of awesome Astronomy for January 2026. Fireworks.

B (1:09)

Yeah, just insert the, like 12 minutes of the London fireworks here.

A (1:14)

I didn't even watch them this year, actually.

B (1:15)

Oh, do you know what? They were good this year.

A (1:17)

Yeah, I didn't do that.

B (1:18)

I think at the end they just kind of went, sod it, and they just let off every single firework that they had left in their arsenal. It was just like blinding. It was good.

A (1:28)

Yeah. They usually go, hey, I didn't watch it this year.

B (1:30)

Yeah, happy New Year.

A (1:31)

Happy New Year.

B (1:32)

What did you do for New Year's then, if you weren't watching the London fireworks?

A (1:36)

What was I doing? Actually, do you know what we were supposed to have. Some university friends of ours was supposed to come, we're going to have a little bit of a party. Old, like, uni friends get together and our kids were all going to go do their thing. And my daughter being older, she's now got her, like, teenage friends and having their own little party thing going on. And our university friends had to cancel for. I know, for unforeseen. Nothing they could do about it. And so we just sat home and you know what? We binge watched a TV series which we'd been meaning to watch all year, and we just watched the whole thing and then watch a bit of old Jules and he's hooting. Nanny.

Summary

AWESOME ASTRONOMY
Episode 165: Soundgarden win at Astrophysics
January 5, 2026
Hosts: Paul & Dr Jeni

Episode Overview

This episode kicks off Awesome Astronomy’s 2026 with customary banter and a heartfelt nod to the resilience of humanity—no world wars in the first quarter of the 21st century, unlike previous centuries. Paul and Jeni bring their signature blend of humor and deep dives into astronomy and astrophysics, covering everything from mind-bending new findings (black hole stars!) to skywatching tips for January. JWST news dominates, alongside a surprising update on the search for oceans beneath Titan’s icy crust.

Main Discussion Points & Insights

1. New Year Reflections & Banter (00:00–09:32)

Themes: Staying optimistic in the face of history; humorous holiday anecdotes (family, TV bingeing, board games).
Notable Exchange: On making a baby cry at New Year’s:
- Jeni (03:09): “...and just literally looked at me and just burst into tears. Oh, it was horrific.”
- Paul: “It’s a common reaction. She might as well start young.”

2. Soundgarden Wins at Astrophysics: Black Hole Stars! (09:32–13:34)

Key Topic: Recent JWST data may explain the universe’s “little red dots” (LRDs) as black hole stars, previously thought to be massive galaxies or dust-enshrouded black holes.
Explanation: Black hole stars—hybrid objects with a supermassive black hole at the center encased in a dense hydrogen envelope, which absorbs and re-emits radiation in the infrared spectrum, matching JWST’s observations.
Astrophysical Relevance: Provides a new lens for interpreting JWST’s early-universe data and the makeup of the LRDs.
Quotes:
- Jeni (11:12): “So the core is an active galactic nucleus…cocooned in a gas shell so thick and turbulent that it mimics the atmosphere of a star.”
- Paul (13:34): “How cool is that?”

3. Globular Cluster Chemistry + Black Hole Formation Connections (13:34–17:21)

Legacy Problem: Diverse chemical compositions in ancient globular cluster stars.
New Model: Extremely massive stars (1,000–10,000x solar mass) formed at cluster centers, polluted surrounding gas via stellar winds during a short starburst phase, explaining chemical oddities.
Seeding Supermassive Black Holes: These monster stars collapse into intermediate-mass black holes, possibly planting seeds for galaxy centers.
Quotes:
- Jeni (15:59): “They vomit some of their rubbish out…pumping all this pollution.”
- Paul (16:58): “This potentially explains the seeds required to grow a supermassive black hole. I know, excellent.”

4. JWST Detects the Oldest Known Supernova (17:21–23:22)

Story: Coordinated international observational campaign detects a gamma-ray burst and, months later (as predicted), JWST confirms the accompanying ancient supernova—13 billion years old.
Scientific Impact: Early-universe supernovae appear similar to modern ones, affirming stellar physics’ consistency over cosmic time.
Quotes:
- Jeni (18:10): “What’s fascinating is this supernova explosion was surprisingly similar to ones that we see in the nearby universe…stellar physics [is] uniform across space, but it’s also uniform across time.”
- Paul (22:24): “Love it.”
- Jeni: “I love a detective story like this.”

5. Titan’s Subsurface Ocean: More a Slushie Than a Sea (23:22–32:26)

Background: Cassini’s original analysis indicated a global subsurface ocean beneath Saturn’s moon Titan.
New Findings: Updated models and improved computational analysis imply Titan’s interior is likely slush—ice with pockets of meltwater—rather than an uninterrupted ocean.
Hope for Life?: Even 0.01–1% liquid in the ice equates to Mediterranean- to Atlantic-sized water reserves; concentrated organics could still support unique habitats.
Quotes:
- Jeni (30:31): “What they found was a really strong signal of energy dissipation. And what that means is slush…”
- Paul (30:31): “That’s both kind of amazing…brilliant…I love how they work this out. But also slightly disappointed.”
- Jeni (31:08): “Those pockets of melt water could actually be reasonably warm…the simulation suggests up to about 20 degrees Celsius…”

January Sky Guide & Observing Highlights

Jupiter at Opposition (32:40–35:24)

Observation Tip: Jupiter is high in the sky all night, ideally positioned, offering the rare chance to observe the full 10-hour rotation in one night.
Quote:
- Paul (34:20): “Yeah. Enjoy your full Jupiter day.”
Profound Moment:
- Jeni (34:50): “You could like once every hour…”
- Paul: “Oh, easily. Oh God, yeah. I mean you would see it change dramatically.”

Moon-Star Conjunctions & Occultations (35:24–37:47)

Events:
- Jan 6: Regulus within half a degree of the Moon.
- Jan 10: Spica passes 1.5° from the Moon.
- Jan 14: Antares grazes the limb (<0.1°) for UK; occultation in far south.
- Jan 27: Moon passes through the Pleiades, covering bright cluster stars.
- Jan 31: Another close Moon–Jupiter pairing.
Side Note: Watch Castor & Pollux (color difference visible), with Jupiter and the Moon nearby.

Deep Sky Highlights: Messier Open Cluster Mini-Marathon (37:47–41:31)

Cluster Tour:
- M41 (Canis Major)
- M50 (Monoceros)
- M46 & M47 (Puppis, with M46’s planetary nebula NGC 2438)
- M93 (Puppis; “Butterfly Cluster”)
- M48 (Hydra/Monoceros; “missing Messier,” discovered by Caroline Herschel)
Banter: Discussion on Sirius as the “disco star” (38:52–39:04).

Lunar Features: Days 4–6 after New Moon (41:31–45:58)

Day 4: Mare Crisium, Mare Fecunditatis, double crater Messier and Messier A, Proclus and its rays, Rima & Rupes Cauchy.
Day 5: Best for naked eye; Sea of Tranquility, Serenity, and Nectar emerge; chain of Theophilus, Cyrillus, Caterina.
Day 6: Southern highlands, complex crater fields, Montes Alpes & Montes Haemus.
Lunar phases for January:
- Full: Jan 3
- Last Quarter: Jan 10
- New: Jan 18
- First Quarter: Jan 26

Notable Quotes & Memorable Moments

Paul (00:00): “There is too much good science and astronomy out there waiting to be discovered for us to start dicking around with trivialities and egotism. Onwards to rationality and biscuits.”
Jeni (11:45): “I thought I would never really be surprised by astrophysics again. But then they pull this out of the bag. This is amazing.”
Jeni (22:25): “The signal that JWST detected was almost exactly as it would be predicted to be a supernova. It was like very small differences, which, you know, is fine…”
Paul (31:08): “Okay, so, so, so there’s still a lot of warm water out there.”
Jeni (31:57): “It might just be that moons with global subsurface oceans may not be as common as we thought.”

Timestamps for Key Segments

Holiday Banter & Board Games: 00:00–09:32
JWST: Black Hole Stars & LRDs Explained: 09:32–13:34
Globular Cluster Chemistry & Black Hole Seeds: 13:34–17:21
JWST’s Ancient Supernova Discovery: 17:21–23:22
Titan’s ‘Slush’ Interior Revelation: 23:22–32:26
Sky Guide: Jupiter & January Highlights: 32:40–37:47
Deep Sky Messier Cluster Tour: 37:47–41:31
Lunar Feature Guide (Days 4–6): 41:31–45:58

Tone & Style

The episode is as witty and personable as ever, mixing “sht” jokes with genuine awe at the universe. The hosts balance technical explanation with analogies and enthusiasm, ensuring listeners of all experience levels are informed and entertained.

Summary

Episode 165 is a perfect exemplar of Awesome Astronomy: scientific discovery, infectious curiosity, and relatable, offbeat humor. The show shines a spotlight on the transformative role of JWST, reveals how new models rewrite our cosmic origin stories, and grounds everything with practical tips for skywatching in January. The update on Titan brings nuance to the ongoing search for habitable worlds, leaving listeners with both sober realism and hope.

For newcomers and seasoned sky-watchers alike, the episode makes the wonders (and weirdness) of the cosmos accessible, relevant, and fun.