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PODCAST

The LIUniverse with Dr. Charles Liu

A half-hour dose of cosmic conversation with scientists, educators and students about the cosmos, scientific frontiers, scifi, comics, and more. Hosted by Dr. Charles Liu, PhD, an astrophysicist at the American Museum of Natural History. Support us on Patreon.

science astronomy

All Episodes

37:13

Cosmic Raspberries and Life on Mars with Dr. Kelly...

The LIUniverse with Dr. Charles Liu ·

2025/09/27

Have we discovered life on Mars? What does the center of our galaxy taste like? To find out, and to kick off Season 5 of The LIUniverse, Dr. Charles Liu and co-host Allen Liu have reached out all the way to Tokyo to chat with Dr. Kelly Blumenthal, the Director of the International Astronomical Union Office for Astronomy Outreach.As always, though, we start off with the day’s joyfully cool cosmic thing, a rock found in Sapphire Canyon by the Mars Perseverance Rover containing potential

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24:21

Chuck GPT Apocalypse, Part 2

The LIUniverse with Dr. Charles Liu ·

2025/06/21

It’s the end of everything! Welcome back to Part 2 of our season finale featuring Dr. Charles Liu, co-host Allen Liu, and our guest archaeology expert and author, Hannah Liu, MEd. (If you haven’t caught up to Part 1, we highly recommend you do before embarking on the next leg of this journey! Listen here or wherever you get your podcasts!)We pick right up where we left off, with the next question from our audience. Daniela asks, “If a black hole hits the Sun, will Earth be destroyed?” Chuck

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45:58

Finding Your Place in Space with Sadie Coffin

The LIUniverse with Dr. Charles Liu ·

2025/05/24

Who are the “Redshift Wranglers” and what can they tell us about the evolution of our universe? To find out, Dr. Charles Liu and co-host Allen Liu welcome back astrophysics PhD candidate Sadie Coffin from the Rochester Institute of Technology whose focus is galactic evolution, and in particular, the spectroscopy of galaxies and their lights.As always, though, we start off with the day’s joyfully cool cosmic thing: the Lucy spacecraft fly-by of asteroid 52246 Donaldjohanson, which was named after

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48:24

Shredding and Stitching Stars with u/Andromeda321...

The LIUniverse with Dr. Charles Liu ·

2025/05/10

If a black hole shreds a star and nobody is around to hear it, does it make a sound? To find out, Dr. Charles Liu and co-host Allen Liu welcome Professor Yvette Cendes, (aka u/Andromeda321 on Reddit), a Radio Astronomer studying transient radio signals from space.As always, though, we start off with the day’s joyfully cool cosmic thing, a report by the Dark Energy Survey that seems to show that the amount of dark energy originally described as the cosmological constant by Albert Einstein might in

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37:22

Half-Baked Stars and Handmade Macarons with Dr....

The LIUniverse with Dr. Charles Liu ·

2025/03/08

What is a transiting brown dwarf, why are they so rare, and how do you find them? Equally important, how do you make a good French macaron? To find out, Dr. Charles Liu and co-host Allen Liu welcome astronomer and astrophysicist Dr. Theron Carmichael.As always, though, we start off with the day’s joyfully cool cosmic thing: a recent paper in the Astrophysical Journal possibly linking a supernova that took place millions of years ago and bombarded Earth with cosmic rays and radioactive iron with a

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41:26

Cold Wars, AI, and Art for Aliens with Rebecca...

The LIUniverse with Dr. Charles Liu ·

2025/02/22

What can the history of science tell us about the world we live in today and where we might be headed tomorrow? To find out, Dr. Charles Liu and co-host Allen Liu welcome historian of science Rebecca Charbonneau, PhD from the American Institute of Physics and the National Radio Astronomy Observatory with expertise in radio astronomy and the search for extraterrestrial intelligence (SETI).This episode kicks off with Allen and Chuck talking about January’s Lunar Occultation of Mars. You can see a

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50:25

Megamasers and Magnetic Fields with Dr. Jackie Villadsen

The LIUniverse with Dr. Charles Liu ·

2025/02/08

What’s the difference between a maser and a megamaser? How does uncertainty lead science to its newest discoveries? To find out, Dr. Charles Liu and co-host Allen Liu welcome back radio astronomer Dr. Jackie Villadsen, a professor at Bucknell University currently researching star/planet magnetic interaction in exoplanet systems.As always, though, we start off with the day’s joyfully cool cosmic thing. In November 2024 a group of researchers announced that they’d found a series of megamasers around

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40:19

A Scintillating Cosmic Conversation with Robert Sparks

The LIUniverse with Dr. Charles Liu ·

2025/01/26

Have you ever wondered how data from the telescopes that peer into our universe ends up in the hands of the astronomers who interpret it? To find out, Dr. Charles Liu and co-host Allen Liu welcome Robert Sparks, currently from the NSF’s NOIRLab, but previously Fermi Lab and the Sloan Sky Survey.The National Optical InfraRed Astronomy Research Lab is responsible for operating the National Science Foundation’s ground based, nighttime optical and near infrared astronomy for the United States. Robert

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01:00:59

Comets, Eclipses and Auroras: The LIUniverse Looks...

The LIUniverse with Dr. Charles Liu ·

2025/01/04

What were the coolest science and sci-fi events in the LIUniverse in 2024, and what’s in store for us in 2025? To find out, Dr. Charles Liu and co-host Allen Liu welcome three members of our production team: Leslie Mullen, our Executive Producer making her first on air appearance, Jon Barnes, our Editor, and Stacey Severn, our Social Media/Patreon Community Director, both of whom are familiar to longtime fans.But first, as always, we start with the day’s joyfully cool cosmic thing: the latest

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45:36

Space Lasers, Solar Panels and Stochastic Parrots...

The LIUniverse with Dr. Charles Liu ·

2024/12/22

How far can following your passions take you in science? To find out, Dr. Charles Liu and co-host Allen Liu welcome the multi-faceted Leah Voytovich, a software development engineer for Project Kuiper who planned on going to med school but instead ended up working on space lasers for Amazon’s satellite internet constellation. As always, though, we start off with the day’s joyfully cool cosmic thing: the use of deuterium levels in the search for exoplanets with advanced civilizations. That’s because

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39:21

A Double Dose of Physics with Dr. Betty Jensen and...

The LIUniverse with Dr. Charles Liu ·

2024/12/07

What was it like forging a career in physics as a woman in the 1970s? To find out, Dr. Charles Liu and co-host Allen Liu welcome the “Dynamic Duo of Physics” – physicist Dr. Betty Jensen and astrophysicist Dr. Mary Lou West.As always, though, we start off with the day’s joyfully cool cosmic thing, a potential new revelation about Jupiter’s Great Red Spot. It seems that the current spot may be only 190 years old rather than 400 years old, and that the first spot described by Cassini in the 1600s may

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28:41

Into the Unknown with Dr. Kelsey Johnson Part 2

The LIUniverse with Dr. Charles Liu ·

2024/11/23

Why should people care about fundamental questions of existence or try to understand the principles of our universe? Because we may be the only sentient beings in existence who can! At least, that’s what returning guest Dr. Kelsey Johnson, past president of the AAS and the ASP, and author of “Into the Unknown – The Quest to Understand the Mysteries of the Cosmos, tells Dr. Charles Liu and co-host Allen Liu as our interview resumes.And then we’re off and running! Kelsey explains where her passion

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31:14

Into the Unknown with Dr. Kelsey Johnson Part 1

The LIUniverse with Dr. Charles Liu ·

2024/11/09

Why is star formation the workhorse of the universe? What is a flocculent galaxy? Which cosmic cataclysm creates new globular star clusters? And why are we currently seeing such amazing aurora in unusual places?To find out, Dr. Charles Liu and co-host Allen Liu welcome astronomer Dr. Kelsey Johnson, past president of the American Astronomical Society (AAS) and of the Astronomical Society of the Pacific (ASP), and author of “Into the Unknown – The Quest to Understand the Mysteries of the Cosmos.” As

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41:00

A HaLIUween Special

The LIUniverse with Dr. Charles Liu ·

2024/10/26

Happy Halloween! In this special episode of The LIUniverse, Dr. Charles Liu and co-host Allen Liu welcome back archaeology expert Hannah Liu, MEd to bring a scientific eye to the holiday and some of its most familiar denizens: witches, werewolves, zombies, black cats and even the Great Galactic Ghoul!As always, though, we start off with the day’s joyfully cool cosmic thing: Comet C/2023 A3 (Tsuchinshan-ATLAS). You’ll learn all about this visitor from the Oort Cloud, including how we know where it

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56:54

Chuck GPT 4.0

The LIUniverse with Dr. Charles Liu ·

2024/10/20

Welcome to Season 4 of The LIUniverse and thank you for joining us on this journey.We’re kicking off the new season with another Chuck GPT episode devoted to answering your questions, and to do that, we’ve brought back archaeology expert Hannah Liu, MEd. She’s not alone: joining Dr. Charles Liu and co-host Allen Liu is The LIUniverse’s Social Media Guru, Stacey Severn. As always, we start off with the day’s joyfully cool cosmic thing, Earth’s temporary second moon 2024 PT5. Don’t get excited,

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24:33

The End of Everything with Dr. Katie Mack Part 2

The LIUniverse with Dr. Charles Liu ·

2024/09/07

How did the universe evolve, and more importantly, how might it end? To find out, Dr. Charles Liu and co-host Allen Liu welcome theoretical cosmologist and astrophysicist, Dr. Katie Mack, author of the recently published book, “The End of Everything (Astrophysically Speaking).” In Part 2, we look at dark matter, Gravitational Memory Effect, and more. (You can listen to Part 1 here.)We dive right in with a question from David: “I was wondering if any physicists have looked into the idea that the

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27:24

Sharing Space with Astronaut Cady Coleman, Part 2

The LIUniverse with Dr. Charles Liu ·

2024/07/20

We jump right back in where we left off in Part 1 of our interview with Dr. Cady Coleman, astronaut, chemist, engineer, flautist, and most recently, the author of “Sharing Space: An Astronaut's Guide to Mission, Wonder, and Making Change.” (If you missed it, listen to Part 1 here.) Chuck asks Cady to tell us more about NASA’s decision to not include small and extra-large spacesuits to “save space.” She explains how, a few months later, they reinstated the extra-large suits, but not the small suits

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30:00

Sharing Space with Astronaut Cady Coleman, Part 1

The LIUniverse with Dr. Charles Liu ·

2024/07/06

What is the overview effect? Why is slow fast when you’re spacewalking? And what would happen to Chuck and Allen’s hair in space?To get the answers to these and other questions, Dr. Charles Liu and co-host Allen Liu welcome back astronaut, chemist, engineer, flautist, and most recently, the author of “Sharing Space: An Astronaut's Guide to Mission, Wonder, and Making Change,” Dr. Cady Coleman. As always, though, we start off with the day’s joyfully cool cosmic thing, a micrometeorite pit 2

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34:09

Composing the Cosmos – Musical Explorations of Deep...

The LIUniverse with Dr. Charles Liu ·

2024/06/02

Is there really a music of the spheres? And why is space so inspirational for creativity? To ponder these cosmic questions, Dr. Charles Liu and co-host Allen Liu welcome noted composer and pianist Bruce Lazarus.As always, though, we start off with the day’s joyfully cool cosmic thing, this time in honor of our guest: the fact that the movie “Oppenheimer” won the Academy Award for Best Original Score. Chuck mentions some other incredible musical scores, especially John William’s soundtrack to

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41:28

Volcanoes on Earth and in Space with Dr. Samantha...

The LIUniverse with Dr. Charles Liu ·

2024/05/04

Volcanoes in space...supervolcanoes here on Earth... and lava lakes everywhere! To get an expert opinion on eruptions, Dr. Charles Liu and co-host Allen Liu welcome Dr. Sam Tramontano, a Post-Doctoral researcher in geology and Earth sciences at The American Museum of Natural History.As always, though, we start off with the day’s joyfully cool cosmic thing, the Juno spacecraft’s two recent close passes (under 1000 miles) of Jupiter’s moon Io and the amazing images of volcanic activity and Io’s lava

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