Rephonic
Artwork for Astronomy Cast
Space Weapons
Nuclear Weapons
NASA
Water Worlds
Satellites
Electromagnetic Pulses
Russia
James Webb Space Telescope
Spacex
China
Space Exploration
Outer Space Treaty
Telescopes
Mars
Europa
Astronomy
Space
Solar Cycle 25
Cold War
Partial Nuclear Test Ban Treaty

Take a fact-based journey through the cosmos. Tune in to hear weekly discussions on astronomical topics ranging from planets to cosmology. Hosted by Fraser Cain (Universe Today) and Dr. Pamela L. Gay (Planetary Science Institute), this show brings the questions of an avid astronomy lover direct to an astronomer. Together Fraser and Pamela explore what is known and being discovered about the univer... more

PublishesWeeklyEpisodes655Founded19 years ago
Number of ListenersCategories
ScienceAstronomyNatural Sciences

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Artwork for Astronomy Cast

Latest Episodes

Astronomy Cast Ep. 772: 2025 Gift Guide By Fraser Cain & Dr. Pamela Gay Streamed live on Nov 9, 2025. It's time once again for our annual gift-giving guide. We've got recommendations for books, movies, TV shows, games, and of course astronomy gear to... more

Astronomy Cast Ep. 771: Comet Tails By Fraser Cain & Dr. Pamela Gay Streamed live on Nov 8, 2025. With the arrival of the comet 3I/Atlas (Asteroid Terrestrial-impact Last Alert System), the world is getting a crash course in comets, their behavior, a... more

Astronomy Cast Ep. 770: The Ethics of Mars Exploration By Fraser Cain & Dr. Pamela Gay Streamed live on Nov 3, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay. It is arguable that humanity now has the technological ability to live on Mars. It woul... more

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Astronomy Cast Ep. 769: Little Red Dots By Fraser Cain & Dr. Pamela Gay Streamed live on Oct 20, 2025. New instruments bring new mysteries, and when James Webb came on line it uncovered a collection of strange, compact, bright objects shifted deeply ... more

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Hosts

Fraser Cain
Publisher of Universe Today, with extensive experience in astronomy journalism and science communication.
Dr. Pamela L. Gay
Senior Scientist for the Planetary Science Institute and Director of CosmoQuest with a focus on citizen science and astronomy outreach.

Reviews

4.8 out of 5 stars from 5.4k ratings
  • A very informative and educational podcast!

    Podcast Addict
    5
    Larian
    2 months ago
  • Annoying

    Dr Pam seems goofy and too silly to take a science podcast serious. She regularly doesn’t actually know what she talks about. DEI hire? Broken speech. Doesn’t know her info. Unprofessional and seems to be looking for Crain To fill in her ignorance. Get a real professional. She’s not smart.

    Apple Podcasts
    1
    Ztrippin
    United States4 months ago
  • It’s just the best!!

    Was the first podcast I ever listened to….. and it’s still just as fantastic approaching 800 episodes. Thanks to you both for teaching me so much about something I love learning about so much.

    Apple Podcasts
    5
    Benny_Boy2000
    United Kingdom5 months ago
  • Skip it

    Thin content, frequent commercial breaks

    Apple Podcasts
    2
    macdon763
    United States7 months ago
  • Lacking Discernment

    I listen to this show because I enjoy hearing your insights on astronomy. It is very unprofessional, unhelpful, and unnecessary to waste airtime complaining that your political candidate didn’t win the recent presidential election. Please work through your personal issues, and stay on point. (Ref: Ep 743)

    Apple Podcasts
    2
    MWarrior
    United States9 months ago

Listeners Say

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

Listeners appreciate the educational depth and engaging discussions about astronomy, often praising the hosts' chemistry and ability to present complex topics in an understandable way.
There are criticisms regarding occasional political discussions that some feel detract from the primary focus of science.
Audience members value the dedication to science outreach and community engagement, with many expressing loyalty after years of listenership.

Chart Rankings

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

Apple Podcasts
#4
United States/Science/Astronomy
Apple Podcasts
#83
United States/Science
Apple Podcasts
#5
Canada/Science/Astronomy
Apple Podcasts
#6
United Kingdom/Science/Astronomy
Apple Podcasts
#72
United Kingdom/Science
Apple Podcasts
#105
Canada/Science

Talking Points

Recent interactions between the hosts and their guests.

Ep. 770: The Ethics of Mars Exploration
Q: What are the ethical issues for this now?
The ethical issues encompass human greed, the physical challenges of survival in a harsh Martian environment, and the unforeseen consequences of human life and potential reproduction on Mars.
Ep. 770: The Ethics of Mars Exploration
Q: So where were you with your sort of like becoming interested and excited in human space exploration and humanity living off planet?
The guest explained that they grew up excited about the possibility of humans living on other planets, influenced by science fiction literature that discussed humanity's survival and expansion into the solar system.
Ep. 707: What Goes Into A Sample Return Mission? Moon & Mars
Q: So there is a bold plan and a less bold plan. What are they?
The American plan involves the Perseverance Rover gathering samples on Mars to be returned by a future mission, while the less ambitious Chinese plan aims for a simpler Mars sample return mission.
Ep. 707: What Goes Into A Sample Return Mission? Moon & Mars
Q: So tell me about the mission. What did the Chinese do?
The Chinese have been testing all the technologies they need with the Chang'e series, culminating in the recent Chang'e 5, which successfully returned samples from the Moon.
Ep. 219 - Planck Mission - REMASTER
Q: When should we expect significant results from the Planck mission?
Significant results are expected to begin coming out around the start of 2012, with more comprehensive data released approximately a year after that.

Audience Metrics

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

Listeners per Episode
Gender Skew
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Frequently Asked Questions About Astronomy Cast

What is Astronomy Cast about and what kind of topics does it cover?

Discussions on astronomical topics cover a wide range of subjects, including celestial bodies, space exploration, and fundamental principles of cosmology. The hosts frequently analyze current events in astronomy, advocate for space missions, and explore new scientific discoveries. Noteworthy elements include a commitment to science education and public engagement, along with a balance of informal banter that makes complex topics accessible to a broad audience. The conversational approach, combined with technical insight from a knowledgeable astronomer, likely contributes to an engaging experience that appeals to both enthusiasts and newcomers to the field.

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How many listeners does Astronomy Cast get?

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What are the audience demographics for Astronomy Cast?

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How many subscribers and views does Astronomy Cast have?

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Which podcasts are similar to Astronomy Cast?

These podcasts share a similar audience with Astronomy Cast:

1. Universe Today Podcast
2. The 365 Days of Astronomy
3. SpaceTime with Stuart Gary
4. The Supermassive Podcast
5. Ask a Spaceman!

How many episodes of Astronomy Cast are there?

Astronomy Cast launched 19 years ago and published 655 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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