Rephonic
Artwork for Walkabout the Galaxy
James Webb Space Telescope
Enceladus
Globular Clusters
Mars
NASA
Milky Way
Asteroid Psyche
Saturn
Cassini
Supermassive Black Holes
Uranus
Black Holes
Artemis Program
Cosmic Rays
Cryovolcano
Pluto
Moore's Somnus
Water
Asteroids
Starship

An irreverent and informative tour of the latest, greatest, and most interesting discoveries in astronomy.

PublishesTwice monthlyEpisodes353Founded12 years ago
Number of ListenersCategories
ScienceComedyNatural Sciences

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Artwork for Walkabout the Galaxy

Latest Episodes

The astroquarks are joined by Jeffrey Kluger, editor at large at Time Magazine and author of 13 books including Apollo 13 and the new book on the Gemini program. Tune in to hear about some of the outlandish ideas that were explored on the way to the ... more

These rings aren't around Uranus, they're somewhere even more odd. We discuss the mysterious and changing ring system around the Centaur object Chiron, new clues about the origin of the solar system from the irregular moons of Jupiter, and the puzzli... more

Adaptive optics techniques get applied to the mirrors in the LIGO gravitational wave observatory, promising a five-fold or greater improvement in sensitivity to gravitational waves from colliding black holes across the universe. And right here in our... more

We take a look the Cheyava Falls rock on Mars, or rather the Perseverance rover took a look at it, and we discuss what it saw which were some intriguing mineral formations that could have a biological origin. And gravitational lensing has enabled ast... more

Key Facts

Accepts Sponsors
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Number of Listeners
Find out how many people listen to this podcast per episode and each month.

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People also subscribe to these shows.

Ask a Spaceman!
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Space Nuts: Astronomy Insights & Cosmic DiscoveriesProfessor Fred Watson and Andrew Dunkley
The Supermassive Podcast
The Supermassive PodcastThe Royal Astronomical Society

Recent Guests

Trina Ray
Planetary scientist at Jet Propulsion Laboratory
Jet Propulsion Laboratory
Episode: Europa Clipper Report from Mars and ATLAS 3I Update from DragonCon 2025
Brendan Byrne
Friend of the show and host of Are We There Yet?
Are We There Yet?
Episode: Interstellar Comet 3I/ATLAS is Out Of This World
Tracy Becker
Astrophysicist and member of Europa Clipper mission team, formerly a graduate student at UCF
NASA
Episode: OG Top Goes to Europa
Cady Coleman
PhD chemist, retired US Air Force Colonel, former NASA astronaut, and author
Episode: Adventures in Space the Cady Way
Dr. Erika Nesvold
Astrophysicist and author of Off Earth, Ethical Questions and Quandaries for Living in Outer Space.
Author
Episode: Ethical Dilemmas in Space Exploration

Hosts

Josh Caldwell
Co-host known for his engaging communication style and ability to make complex topics relatable.
Addie Dove
Co-host who brings insightful perspectives and enthusiasm for science communication.
Jim Cooney
Co-host recognized for his comedic flair and ability to simplify complex scientific discussions.
Tracy Becker
Co-host with a focus on explaining scientific concepts related to astronomy with a lively sense of humor.
Audrey Martin
Co-host with a knack for engaging storytelling and making scientific topics accessible and enjoyable.

Reviews

4.8 out of 5 stars from 253 ratings
  • HOT TAKE!

    The takes are indeed hot.

    Apple Podcasts
    5
    Non-Quark
    United States3 months ago
  • Keep it up

    The podcast is good, but I’m really intrigued by Josh’s point of view and enjoy how he breaks everything down for undereducated folks such as myself to understand.

    Go science! And keep up the good work!

    Apple Podcasts
    5
    Dave of Det
    United States7 months ago
  • Informative and fun at the same time

    I can't say I have come across many science podcasts that are both informative and fun -- amazingly this podcast does both and makes me feel connected to important developments in astronomy.

    Apple Podcasts
    5
    mr foo
    United Statesa year ago
  • Great science podcast!

    I look forward to this every week, it’s one of my favorites. Jim is hilarious!

    Apple Podcasts
    5
    NikolaiGranakov
    United States2 years ago
  • Informative and fun at the same time

    I can't say I have come across many science podcasts that are both informative and fun -- amazingly this podcast does both.

    Apple Podcasts
    5
    mr foo
    United States2 years ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

The hosts' chemistry is frequently praised, adding to the overall enjoyment of the content.
Some critiques mention the occasional chaotic conversation style but overall, the camaraderie is seen as a strength.
Listeners appreciate the engaging and humorous discussions that make complex astronomical concepts accessible.
Many find the mix of education and entertainment particularly refreshing, making it a favorite among science enthusiasts.

Chart Rankings

How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.

Talking Points

Recent interactions between the hosts and their guests.

Europa Clipper Report from Mars and ATLAS 3I Update from DragonCon 2025
Q: What is the trivia question related to the 404 error code?
The trivia primarily relates to the April error code 404 and its origins, examining aspects of its assignment, significance at CERN and relation to software.
Interstellar Comet 3I/ATLAS is Out Of This World
Q: What do you think about the interstellar comet 3I/ATLAS?
3I/ATLAS appears to be much larger than other known interstellar objects and is expected to come very close to the sun, offering an exciting opportunity for scientific observation.
Vera Rubin Observatory Sets Sights on the Universe
Q: What does the Vera Rubin Observatory aim to achieve?
It aims to discover a large number of asteroids and improve knowledge about dark matter and dark energy over the course of its survey.
Vera Rubin Observatory Sets Sights on the Universe
Q: What one thing would you love, like the most spectacular, amazing thing to see, if you could?
Tracy would like to see an actual picture of an event horizon around a supermassive black hole to help understand astrophysics.
A Slurping Black Hole and a Win for the Streaming Instability
Q: How long after the last human dies, assuming it's tomorrow, will the last artificial light go out?
It is about 100 years for typical artificial lights, depending on how they are powered and assuming power supply does not continue.

Audience Metrics

Listeners, social reach, demographics and more for this podcast.

Listeners per Episode
Gender Skew
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Frequently Asked Questions About Walkabout the Galaxy

What is Walkabout the Galaxy about and what kind of topics does it cover?

Insightful and engaging, this podcast brings listeners a unique mix of humor and scientific exploration within the realm of astronomy. With each episode, the hosts tackle a wide variety of topics, from astronomical missions and discoveries to the intriguing features of celestial bodies. Listeners can expect an informative dialogue paired with lighthearted banter, making complex scientific concepts accessible and entertaining. The episodes often highlight significant astronomical findings, like black hole mergers and planetary exploration missions, along with lively discussions about their implications for our understanding of the universe.

What sets this podcast apart is its casual yet scholarly approach, where humor is interwoven with in-... more

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Which podcasts are similar to Walkabout the Galaxy?

These podcasts share a similar audience with Walkabout the Galaxy:

1. Ask a Spaceman!
2. SpaceTime: Your Guide to Space & Astronomy
3. Universe Today Podcast
4. Space Nuts: Astronomy Insights & Cosmic Discoveries
5. The Supermassive Podcast

How many episodes of Walkabout the Galaxy are there?

Walkabout the Galaxy launched 12 years ago and published 353 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on Walkabout the Galaxy?

Recent guests on Walkabout the Galaxy include:

1. Trina Ray
2. Brendan Byrne
3. Tracy Becker
4. Cady Coleman
5. Dr. Erika Nesvold

To view more recent guests and their details, simply upgrade your Rephonic account. You'll also get access to a typical guest profile to help you decide if the show is worth pitching.

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