A Dark Universe Unveiled

A Dark Universe Unveiled

Author: Joshua Colwell, Adrienne Dove, and James Cooney January 29, 2026 Duration: 44:35

Scientists head to the volcanic fields of Iceland to test instruments for the VERITAS mission to Venus, Artemis II is ready for its historic flight to the Moon, and the Dark Energy Survey reveals the distribution of dark matter on an astounding scale. For mind-blowing astro-stuff, space news, and trivia, join the astroquarks on Walkabout the Galaxy.


Ever wondered what it would be like to grab a coffee with a few planetary scientists who can’t help but find the humor in the cosmos? That’s the feeling you get with Walkabout the Galaxy. Hosted by Joshua Colwell, Adrienne Dove, and James Cooney, this isn’t a dry lecture from a distant lecture hall. Instead, it’s a lively, often funny conversation that feels like you’re right there with them, unpacking the universe’s latest headlines. Each episode digs into the newest and most fascinating discoveries in astronomy and space science, but the approach is grounded and genuinely curious. You’ll hear the hosts’ real excitement and occasional friendly debates as they translate complex ideas from recent papers or major missions into stories anyone can connect with. The tone is naturally irreverent, which makes the science stick, and their camaraderie turns each discussion into an engaging journey. Tuning into this podcast means getting a front-row seat to a casual yet deeply informative chat about everything from quirky asteroids to the profound mysteries of distant galaxies, all delivered with a warmth that reminds you why looking up at the stars is so compelling in the first place. It’s a perfect blend of solid science and natural comedy, making the vastness of space feel a little more like home.
Author: Language: English Episodes: 100

Walkabout the Galaxy
Podcast Episodes
Psyche Revisited and Two Giant Black Holes [not-audio_url] [/not-audio_url]

Duration: 44:35
The presumed metallic asteroid Psyche gets a new look before the spacecraft of the same name gets there in 2029, and it reveals different spectral characteristics than were observed in previous studies. We discuss the my…
The Tiniest Ocean World and the Brightest Quasar [not-audio_url] [/not-audio_url]

Duration: 45:36
Saturn's so-called Death Star moon Mimas may harbor a global subsurface ocean based on analysis of Cassini data of the tiny moon's orbit and rotation. And in the distant universe, what was previously thought to be a run-…
Space Oddities in the Solar System [not-audio_url] [/not-audio_url]

Duration: 41:09
Water molecules have been observed on the surface of an asteroid for the first time, and new studies help explain some of the odd behavior of planetary ring systems, including why they even exist around small objects in…
When Will We Walk on Mars? [not-audio_url] [/not-audio_url]

Duration: 41:41
In this special episode recorded live at MegaCon Orlando 2024, we are joined by NPR space reporter Brendan Byrne to take a close look at where we are in the mission to get people to the red planet. We take a look at the…
Large Cosmological Structures and JWST Spies a Binary TNO [not-audio_url] [/not-audio_url]

Duration: 37:43
There's another claim for a violation of the cosmological principle - that all parts of the universe are basically the same on large scales - but Top quark Jim Cooney explains all is not lost for the standard model of th…
Trojan Mysteries and Titan Snowbergs [not-audio_url] [/not-audio_url]

Duration: 49:07
Strange disappearing islands in the hydrocarbon lakes of Saturn's giant moon Titan may be fluffy icebergs of hydrocarbon snow. If you're on Titan, definitely don't eat the snow, yellow or not. As the Lucy mission heads t…
Agents of Chaos and Iron Snow [not-audio_url] [/not-audio_url]

Duration: 42:40
What role has Jupiter played in the existence of our warm and cosy home planet? Has it been bravely using its gravity to keep the inner solar system calm, or did we luck out and escape getting hurtled out of the solar sy…
Globular Clusters and Life in Enceladus [not-audio_url] [/not-audio_url]

Duration: 43:30
New analysis of Cassini data suggests more complex hydrocarbons are part of Enceladus's global sub-surface ocean. We discuss the prospects for life on this tiny moon. The JWST continues to deliver scientific bonanzas, no…
Pluto Cryovolcano and a Cosmological Supervoid [not-audio_url] [/not-audio_url]

Duration: 42:52
At Pluto's frigid temperatures, even what we breathe is frozen. This can give rise to unusual cryovolcanism, and new research suggests a super cryovolcano tens of kilometers across on the ninth planet (yes, we went there…
Mysterious Cosmic Ray and Martian Airglow [not-audio_url] [/not-audio_url]

Duration: 46:36
The second most energetic cosmic ray (really a particle) ever observed smashed into the Earth a couple of years ago, raising more questions about the origins of these incredibly energetic particles. Solar wind particles…