All Episodes
Walkabout the Galaxy — 373 episodes
Mapping a Galaxy's Dark Matter and a Game-Changing Space Telescope
Black Hole Stars and Solar Instabilities
Dyson Spheres and Interstellar Colonization
Black Holes Come Back for Seconds and a Rocky Exoplanet with an Atmosphere
Distant Quasars and Earth's Quasi-Moon
I See a Big Moon Rising and a Bright Radio Sky
Europa's Disappearing Plumes
Second Generation Black Hole Mergers and Solar System Chaos
Whacky Black Hole Collisions and Strange Uranian Rings
Little Plutino Has An Atmosphere and Making Sense of Saturn
Superkilonova and Artemis II Recap
A Whisper of a Hint of Primordial Black Holes plus Earth BLOBs
Supermassive Black Holes Supersoaking Other Galaxies
Snowball Earth was Cold and Scary and the Milky Way Magnetic Field is a Mess
Planetary Nebulae and Active Asteroids Get a Closer Look
A Dark Universe Unveiled
Crazy Spinners in the Asteroid Belt and S8 Tension
Cosmic Rays from Everywhere and Stringy Ancient Galaxies
Interstellar Star Scars and Poop on Mars
Gravothermalizing and Baby Black Holes
An Ancient Moon of Mars?
Why Is There A Universe At All?
The Amazing and Crazy Story of Gemini and Jumbo Black Holes
Rings Around a Comet, Betelbuddy, and Odd Jupiter Moons
Adaptive LIGO and a New Look at an Old Crater
Einstein Cross Reveals Dark Matter and a Life-y Mars Rock
Exo-Pluto Debris in Our Solar System and Axions Galore
Europa Clipper Report from Mars and ATLAS 3I Update from DragonCon 2025
Trappist-1, ESCAPADE, and Axions
Weird Black Hole Blazar and Water Ice Glaciers on Mars
Forbidden Black Hole Merger and Chaos on Europa
Interstellar Comet 3I/ATLAS is Out Of This World
Vera Rubin Observatory Sets Sights on the Universe
Supernova Hazards and Cloudy With a Chance of Sand
Cool Planetary Cores and Lava Fountains Galore
The End of the Universe As We Know It and We Feel Fine
A Slurping Black Hole and a Win for the Streaming Instability
Vesta Chip Off the Old Block and a Nearby Dark Molecular Cloud
Ultralight Dark Matter and Peanut Asteroid Hot Take
Hot Takes on Water on Earth and Black Hole Singularities
Weird Convection on Venus and a Wrinkle in the Lambda Cold Dark Matter Model
Supernovas and Mass Extinctions
Life on Hycean Worlds, Interstellar Debris, and Dark Matter Survey
Are We Inside a Black Hole?
Oort Cloud Spiral, the Color of Mars, and a New Dwarf Galaxy
Did You Quipu?
Hubble Tension Won't Go Away But Some Exoplanets Do
Exocomets, Io, and the Great Dimming of T Tauri
Little Red Dots and Big Black Holes
Kiss and Capture for Pluto and Charon and Dark Energy Remains Dark
Quasi Particles, Pluto's Moons, and Cosmic Rays
Mysterious Dark Comets
Making Big Blobs is Hard
Neutrino Fog and the Hunt for Dark Matter
Not All Supernovae Are Created Equal
Is There Another Belt of Comets?
Trojan Asteroids Everywhere
Basin Instinct - Cosmological Structure and Edible Asteroids
OG Top Goes to Europa
Back in Black Holes
Black Hole Spindown Chirp and a 9-Day Geologic Rumble
Recent Lunar Volcanic Activity and the Metallicity Cliff
Adventures in Space the Cady Way
Ocean World Mimas and the JUICE Slingshot
Barney the Dinosaur Killer from Outer Space and Water Inside Mars
The Fermi Paradox - Are We Truly Alone?
Chemical Whispers of Life on Mars
Lunar Caves for Future Habitation
Dark Matter, Deuterons, and a Mixed-Up Protoplanetary Disk
Cygnus X-3 and a Naked-Eye Nova
Primordial Black Holes Make the Galaxy Go 'Round
Full Circle to the Origins of Carbon and Exotic Gravity
Volcanic Activity on Venus RIGHT NOW!
Watery Erigone and Rogue Stars in the Milky Way
Dyson Spheres and a Molten Planet
The Low Down on Big G and the Young Moon of Dinkinesh
Dark Matter Wins Again
Surprises from Bennu and the Milky Way
The Dark Ages of the Universe
A Nova Visible this Year?
Psyche Revisited and Two Giant Black Holes
The Tiniest Ocean World and the Brightest Quasar
Space Oddities in the Solar System
When Will We Walk on Mars?
Large Cosmological Structures and JWST Spies a Binary TNO
Trojan Mysteries and Titan Snowbergs
Agents of Chaos and Iron Snow
Globular Clusters and Life in Enceladus
Pluto Cryovolcano and a Cosmological Supervoid
Mysterious Cosmic Ray and Martian Airglow
Ethical Dilemmas in Space Exploration
The Origin of Supermassive Black Holes
Dinky and the S8 Tension
The Surprising Interiors of Mars and Venus
Detecting ETs and Intergalactic Baryons
Neutron Star Quakes and the Streaming Instability
Pangaea Ultima, Antimatter Gravity, and the Evection Resonance
Short Take: Asteroid Sample and Dark Matter Hopes
Trouble in the Universe: El Gordo and Dinky
Ho'oleilana and Weird Spots on Mercury
Water in the Solar System - Dragoncon 2023
Diamonds, Granite, and Hubble Tension
The Sun Bounces Gamma Rays and a Muon Surprise
Rogue Planets Galore and the Age of the Universe
Dark Stars and Water in Hot Places
X-Rays from Mercury and a Different Kind of Gravitational Hole
The Rumble in the Universe
All Things Dark: Matter, Energy, and More
Earth's Pebble Accretion and the Boring Billion
Supernovae Near and Far
Is the Universe Left or Right-Handed?
Scary Things That Can Happen To Planets
Crazy Rings, Watery Moons, and Ancient Black Holes
The Impact of Impacts on Water on Mars
Live at Nerd Nite with the Moon, JUICE, and M87 Black Hole
MegaCon 2023 and JWST
Oumuamua Explained and Dark Matter Near Black Holes
Active Volcanism on Venus!
It's About Time!
Sweet Europa Tail
Runaway Black Holes and Certified Organic Asteroids
Whacky Water and Weird Rings
The Trouble with Neutrinos and Other Mysteries
The Tiniest Wormhole
The Super Earth Assembly Line
On Top of Nuclear Fusion
All About STEVE and GRBs
Trojans and Axions
Up, Up, and Away
Chasing Geotail and Martian Impacts
Astroquarks 300!
Life on Mars Killed Life on Mars
Pop III!
Payback for Chicxulub!
Boom: DART, Volcanoes, and Supernovae
DragonCon 2022: To the Moon with Artemis and More
Water Worlds at Distant Suns
Ancient Astronomers and Ancient Lunar Impacts
Strange Lightning and the Youngest Planet
Is There Something Wrong with the Standard Model?
The Edges of Space, the Solar System, and the Universe
JWST and the Circle of Life of Stars
Fly Me to the Moon Again and Again
Two Odd Balls: Charon and Arrokoth
Noxious Fumes from Stars and Moons
The Galactic Gamma Ray Background from Pulsars
Space Haboobs and Martian Haboobs
Yes MegaCon There IS a Black Hole
Lunar Plants and Micronovae
Gravitational Redshift and Sci-Fi Body and Time Shifts
Mapping the Early Universe in HD
Planetary Decadal Survey with Almost no Uranus Jokes
The Cosmic Significance of Tiny Things
The Sounds of Mars and the Lights of the Earliest Stars
Ultralight Dark Matter
All the Light in the Universe
When Galaxy Clusters Collide
How Smart Is Your Planet?
Psyche-ology and Generally Crazy Relativity
Hot Fusion and Crashing Satellites
A Bouncy Universe
IWOW
The Local Solar Bubble and Another Dusty Star
Lagrange Points Everywhere
Q-Balls!
Eggshell Planets and the Inexorable Growth of Black Holes
JWST and the Era of Reionization
Strange Atoms and Jupiter's Deep Atmosphere
Perpendicular Planets and a Chip Off the Old Moon
Galactic Protoclusters and the Heat of Information
Sterile Neutrinos and True Polar Wander
A World That's Out Of This Galaxy
Captain Kirk Goes to Space and Other Oddities
Binaries Galore
Centaurs and Rocky Clouds
The Psychohistory of Astroquarks
Taking the Measure of the Universe with Quasars
The Mind Blowing Wave Particle Duality of Light
Odd Galaxies and Odder Planets
Hycean Worlds and Nudging Asteroids
Saturn's Chewy Center and the Milky Way's Broken Arm
The Missing Astroquark
Pairs of Bosons, Photons, and Asteroids
Exomoons and Inside Mars
The Cosmological Lithium Problem
Rogue Planets, Gravitational Waves, and Life in Enceladus
Things that Blow. And Clocks.
Stars That Blink
The Cosmological Principle
Back to Venus with Several Rants
How the Universe has Aged
Of Cosmic Rays and Neptune's Wandering Ways
Ten Things I Hate About Neutrinos
Surprises at the Centers of Things
A Whirl of Neutron Stars
There Are Five Lights!
The Extra Glow at the Heart of the Milky Way
You Can't Be Darth Serious
The Fifth Element
Space The Final Frontier
Warp Drive!
Deep Dive Into a Globular Cluster
If a Spacecraft Lands on an Empty Planet, Does it Make a Sound?
Hairy Black Holes
The Surprising Science of Space Dirt
Perseverance, Cache Me While You Can!
The Dark and Distant Rumbles of Spacetime
Ancient Planets and Bumblebee Gravity
Meet Pillownaut Heather Archuletta
It's Not That Dark After All
Taking the Measure of the Milky Way
Something Old, Something Blue
The Birth of a Magnetar
We Saw a Magnetar Burp!
OMG The Moon!
Asteroid Bennu Gets TAGged!
The Airing of Grievances!
Jerk, Snap, Crackle, Pop
It's a Small Waterworld
A Deep Dive into Venus's Atmosphere
Mary Robinette Kowal
Big Black Holes and Tiny Water Worlds
Pressures Great and Small
Ceres is a Planet with Water!
The One With All The Fields
Strange Neutrinos and the Bucket Brigade
One Mystery Solved Another Mystery Deepens
The Great Wall of Galaxies
Things That Go Bump in the Dark
The 200th One
Of Magnetars and Mars
Planet Formation Caught in the Act
The Universe May Be Empty But We Are Together
A Backyard Black Hole
Is The Sun a Sunlike Star
The Quark with a Fork
When You Wish Upon a Neutrino
Psyche Out: Metal Asteroids and an Irregular Universe
Alien Life and Star Trek Diseases
The Importance of Being Gassy
A Pulsating Star and a Salty Asteroid
It's That Time of the Solar Cycle
Gravitational Waves Rumbling Through the Universe
All The Galaxy's a Stage And We Are Merely Astroquarks
Things That Go Burst in the Night
Sexaquark!
The Mysterious Case of the Dragging Frame
The Asteroid versus the Volcanoes
Lucy, TESS, and the Dark Energy Mess
Hashtag Fundamental
Betelgeuse, Betelgeuse, Betelgeuse
Hot Blobs and Magnetic Spots
Jim the Asteroid Licker
Would You Like Your Chunky Space with a Swirl?
Antimatter and Wormholes
When a Giant Black Hole Blows a Lot of Gas
Astroquark Soup
The Vibration Dance and the Mole Shimmy
Bananas About Brown Dwarfs
Lost in Space: Rogue Planets and the Intergalactic Web
I've Got My Eyeball Planet on You
The One From Geneva
Moon Water and Galaxy Bubbles
The Podcast of Dorian Hurricane
Starforker
Will the Sun Burp When it Eats the Earth?
When Light Climbs Out of a Hole
Where Silence Has Lease
The Black Hole Middle Class
Dragonfly Me to the Moon of Saturn
Left and Right in the Universe
The Universe is Running Hot and Cold
Forbidden Planets
All About Bob
Moon Quakes and Venus Shakes
Impacts Large and Small and Very Large
Is Mars Farting or Burping?
I Can See Your Black Hole From Here
There are Dark Forces at Work in the Universe
Bennu is Puking Asteroid Pebbles
Too Early to the Party: Trek, The Orville, and Aliens
The One with Joe Haldeman
Are You Positive That's North?
To Seek Out and Explore
Galaxy, Right Ahead!
The Year of the Astroquark
2018 Year in Review with Top Quark Trivia
Jim Goes Off on Fahrenheit
Dark Matter Hurricane
It's All About U
Everything You Always Wanted to Know About Alien Sex
Fireballs and Penitentes
Where No Podcast Except This One Has Gone Before
Of Goblins and Planets
The Big Falcon Episode
An Exthwartation of Quarks, or Jupiter's Magnetic Nubbin
The One That Should Have Been Sponsored by Starburst
When the Moon Hits Your Eye, You Might Get a Little Wet
Really Real Actual Water IN Mars. Probably.
The Little Neutrino That Could
What Goes Around Comes Around
Wouldn't You Like to Hayabusa Too?
USA to NASA: Save Our Planet!
Won't You Be My Neighbor Universe?
The Interstellar Interloper and the Ravenous Black Hole
Does Mars Have a Chewy Center?
Chasing New Horizons with David Grinspoon
Danger Astroquarks!
I Think I Stepped in Some Dark Matter
For Stephen Hawking
Magnetic Ink Blot Test in Space
Print Me a Space Base, Please
The One Sponsored by Space Sex
I Could Swear I Left My Satellite in Orbit!
The Old Stars Tell Tales
The One About Bunburra Rockhole
A Very Low Rumble in Space
2017 - A Great Year for Space
Antimatter from your Local Thunderstorm
Fly Me To The Moon (of Saturn!)
Kronos the Planet Eater
Rogue Asteroid!
To Kilonova
I Left My Communicator on Sigma Iotia!
SOFIA, Nobel and Kuiper - What's in a Name?
OSIRIS-REx Gets the Gravity Assist and Scores!
To Be, Cassini, Or Not To Be
Florence and the LIGO Machine
Are Those Diamonds on Uranus?
Of Eclipses and Starspots
Of Zombies, Comets and Kilograms
Cold and Hard, not Warm and Fuzzy
Going Rogue!
Teleport Me to the Great Red Spot!
Where No One Has Gone Before
Is Planet 9 Lost in Space?
Leggo my LIGO!
Uranus Gets Bedazzled!
Is That Inflation Or Are You Just Happy To See Me?
Juno What I Mean!
The Solar System is a Bubble in Space
The Grand Finale is Finale Here
Enceladus is a Little Bit Gassy!
That's Quite a Hadron You've Got There!
The Great Black Hole Escape
Space Dust Keeps Falling on my Head
The One About Patrick Stewart
Strange New Worlds
White Dwarfs and Planetary Nebulae
Stripey Buggers
A Space Odyssey
The Hottest Year in a Row!
Walk About the Great Big Group of Stars
The Fartological Cycle
Three Quarks for JJ Abrams!
I Dub Thee Egotron
To Boldly Go!
Extraterrestrials: Are They a Thing Yet?
StarzaniTrekWars!
For The World Is Not Hollow
The Sun Needs a Red Corvette
Earth's Mini-Stalker
Black Holes: What Goes In Might Come Out
Watching Supernovae with H2O
Take Me to Mars (and Back Again!)
Supernova Breakout!
Nice Model Not So Nice
The Babiest Galaxy
Attack of the Gravitational Wave
Planet 9 From Outer Space!
El Nino and the Price of Anchovies
Exploring the Kuiper Belt with Alan Stern
The Mystery of Mars' Missing Air