Rephonic
Artwork for Astronomy Cast
NASA
James Webb Space Telescope
Astronomy
Dark Matter
Mars
Dark Energy
Rogue Planets
Black Holes
Supernova
Comets
Exoplanets
Hubble Space Telescope
Milky Way
Edwin Hubble
Big Bang
Star Formation
Spiral Galaxies
Jupiter
Venus
Space Exploration

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

PublishesWeeklyEpisodes913Founded20 years ago
Number of ListenersCategories
AstronomyNatural SciencesScience

Listen to this Podcast

Artwork for Astronomy Cast

Latest Episodes

Help us keep Astronomy Cast ad-free: patreon.com/astronomycast We removed all ads from the show. We need to get to 1500 patrons to keep it this way. We need your support! Streamed live on Sep 21, 2026 Hosted by: Fraser Cain and Dr. Pamela L. ... more

YouTube

Help us keep Astronomy Cast ad-free: patreon.com/astronomycast We removed all ads from the show. We need to get to 1500 patrons to keep it this way. We need your support! Streamed live on Sep 7, 2026. Hosted by: Fraser Cain (@frasercain) and ... more

After 20 years, it's time to make some changes. With your patronage we can ditch the ads & turn up the science. Please join our Patreon community at patreon.astronomycast.com

Streamed live on Sep 7, 2026. Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest) This show is supported through people like you on Patreon.com/AstronomyCast To celebrate our 20th season, we thought we'd go back right to the begi... more

Key Facts

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

Similar Podcasts

People also subscribe to these shows.

The 365 Days of Astronomy
The 365 Days of Astronomy365DaysOfAstronomy.org
Ask a Spaceman!
Ask a Spaceman!Paul M. Sutter
The Supermassive Podcast
The Supermassive PodcastThe Royal Astronomical Society

Hosts

Fraser Cain
Host of Astronomy Cast; publisher of Universe Today
Pamela Gay
Co-host, astronomer; Senior Scientist at the Planetary Science Institute; Director of CosmoQuest

Reviews

4.8 out of 5 stars from 5.5k ratings
  • Great for the Novice and Professional Alike

    I recall inviting Dr. Pamela Gay to an event I hosted once, so knowing her style, I started listening more than a few years back. As an astronomy educator I appreciate hearing about topics I deal with regularly in my planetarium job and for the accurate, up-to-date information they provide.

    Apple Podcasts
    5
    Starman44870
    United States11 days ago
  • Real Science

    A scientist at the top of her field and a likable space journalist and content creator, both of whom are excellent communicators. No wonder their pod has been in production for 20 years. What’s not to like?

    Apple Podcasts
    5
    Prsopect Farms
    United States17 days ago
  • Subscriber only. Sad face

    I have loved this show for many years. Recently I changed jobs and have a long commute. To pass the time I have been working backwards through old shows. Sadly the past library has suddenly been blocked by subscriber only. Guess I’ll have to move over to Supper Massive podcast for my travels.

    Apple Podcasts
    1
    Tacllem
    United States3 months ago
  • Long time listener

    And we’re back from a break, but it’s time for another break…

    I love the show, been listening since the beginning, but it’s hard to recommend the show now with so many breaks in the middle. Any way you can just clump the ads at the beginning and end?

    Apple Podcasts
    5
    thePeacePirate
    United States4 months ago
  • Mostest Bestest Astronomy Podcast Ever

    Pamela and Fraser have an amazing track record of producing incredibly high-quality astronomy programs that cover absolutely everything you can imagine. Fraser is a fantastic journalist, and Pamela is such a wonderful communicator of quite complex ideas. Their chemistry is fantastic, but above all, they are totally committed to making astronomy and science available and accessible to everyone, even if you can’t afford to subscribe. Hyper mega astro superstars. Listen now!!!

    Apple Podcasts
    5
    Dr Ronald McCoy
    Australia5 months ago

Listeners Say

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

Overall positive reception for the hosts' chemistry and depth of astronomy content, with praise for accessibility and outreach.
Ads and sponsorships are a frequent topic in reviews, with mixed feelings about ad breaks.
Listener loyalty remains strong across many years, though some critique ad frequency and occasional political references.

Chart Rankings

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

Apple Podcasts
#4
United States/Science/Astronomy
Apple Podcasts
#126
United States/Science
Apple Podcasts
#6
Canada/Science/Astronomy
Apple Podcasts
#8
United Kingdom/Science/Astronomy
Apple Podcasts
#80
Canada/Science
Apple Podcasts
#130
United Kingdom/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
Location
Interests
Professions
Age Range
Household Income
Social Media Reach

Frequently Asked Questions About Astronomy Cast

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

A science-forward show that makes astronomy accessible through lively host banter and clear explanations. Episodes consistently cover how the cosmos works—from rocket tech and planetary science to starlight, exoplanets, and cosmic phenomena—often weaving in recent research, mission updates, and thought experiments. The format centers on two long-running, enthusiastic hosts who balance rigorous science with approachable storytelling, and it's noted for its upbeat chemistry, transparency about funding, and audience engagement. A standout trait is its long-running dedication to outreach and citizen science, sometimes alongside sponsorships and Patreon support which help sustain frequent content. This combination makes it well-suited for listen... more

Where can I find podcast stats for Astronomy Cast?

Rephonic provides a wide range of podcast stats for Astronomy Cast. We scanned the web and collated all of the information that we could find in our comprehensive podcast database. See how many people listen to Astronomy Cast and access YouTube viewership numbers, download stats, audience demographics, chart rankings, ratings, reviews and more.

How many listeners does Astronomy Cast get?

Rephonic provides a full set of podcast information for four million podcasts, including the number of listeners. View further listenership figures for Astronomy Cast, including podcast download numbers and subscriber numbers, so you can make better decisions about which podcasts to sponsor or be a guest on. You will need to upgrade your account to access this premium data.

What are the audience demographics for Astronomy Cast?

Rephonic provides comprehensive predictive audience data for Astronomy Cast, including gender skew, age, country, political leaning, income, professions, education level, and interests. You can access these listener demographics by upgrading your account.

How many subscribers and views does Astronomy Cast have?

To see how many followers or subscribers Astronomy Cast has on Spotify and other platforms such as Castbox and Podcast Addict, simply upgrade your account. You'll also find viewership figures for their YouTube channel if they have one.

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. Ask a Spaceman!
5. The Supermassive Podcast

How many episodes of Astronomy Cast are there?

Astronomy Cast launched 20 years ago and published 913 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

How do I contact Astronomy Cast?

Our systems regularly scour the web to find email addresses and social media links for this podcast. We scanned the web and collated all of the contact information that we could find in our podcast database. But in the unlikely event that you can't find what you're looking for, our concierge service lets you request our research team to source better contacts for you.

Where can I see ratings and reviews for Astronomy Cast?

Rephonic pulls ratings and reviews for Astronomy Cast from multiple sources, including Spotify, Apple Podcasts, Castbox, and Podcast Addict.

View all the reviews in one place instead of visiting each platform individually and use this information to decide if a show is worth pitching or not.

How do I access podcast episode transcripts for Astronomy Cast?

Rephonic provides full transcripts for episodes of Astronomy Cast. Search within each transcript for your keywords, whether they be topics, brands or people, and figure out if it's worth pitching as a guest or sponsor. You can even set-up alerts to get notified when your keywords are mentioned.

Find and pitch the right podcasts

We help savvy brands, marketers and PR professionals to find the right podcasts for any topic or niche. Get the data and contacts you need to pitch podcasts at scale and turn listeners into customers.
Try it free for 7 days