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The 365 Days of Astronomy

365DaysOfAstronomy.org
Exoplanets
Mars
Moon
Milky Way
James Webb Space Telescope
Jupiter
NASA
Near-Earth Objects
Saturn
Constellations
Planetary Science Institute
Meteorites
Betelgeuse
Asteroids
Messier Objects
Magnetars
Big Bang
Dark Matter
Catalina Sky Survey
Cosmology

The 365 Days of Astronomy podcast launched in 2009 as part of the International Year of Astronomy. This community podcast continues to bring you day after day of content across the years. Everyday, a new voice, helping you see the universe we share in a new way. This show is managed by Avivah Yamani, edited by Richard Drumm. This podcast is funded through Patreon.com/CosmoQuestX and produced out o... more

PublishesDailyEpisodes300Founded18 years ago
Number of ListenersCategories
AstronomyScience

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Artwork for The 365 Days of Astronomy

Latest Episodes

www.youtube.com/watch?v=uAuyv9TCThI

Hosted by: Fraser Cain (@frasercain)

From Jan 17, 2017.

In 1859, the Sun gave off the most powerful solar flare on record. A blast of radiation and particles so strong it fried electrical wires and s... more

Paul Hill, Ralph Wilkins and Dr. Jenifer "Dr. Dust" Millard host.

Damien Phillips, John Wildridge and Dustin Ruoff produce.

Recorded in 2018.

Paul, Ralph & Jeni interview Libby Jackson OBE FRAeS, former manager of human exploration program and... more

www.youtube.com/watch?v=J0DTzACDj7Y

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

Streamed live on Oct 27, 2026.

Once again, chemical rockets are ubiquitous but not as powerful as other propulsion ideas. And o... more

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org

From May & June 2026.

Today's 2 topics:

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Key Facts

Accepts Guests
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Find out how many people listen to this podcast per episode and each month.

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Ask a Spaceman!
Ask a Spaceman!Paul M. Sutter

Recent Guests

Paul M. Sutter
Astrophysicist and host of Ask A Spaceman
Episode: Ask A Spaceman Ep. 283: What's Really Going on with UAPs?
Matthew Graham
Caltech researcher studying time-domain astronomy and supermassive black holes
Caltech
Episode: EVSN - Exposed Planetary Core Discovered & LIGO Reveals "Spooky Popcorn"
Kimberly K. Arcand
Chandra science visualisation lead, science communicator and co-author of Why Space Will Freak You Out
Chandra X-ray Observatory
Episode: Space Stories - Let's Look at the Weirdest Corners of Space!
Megan Watzke
Chandra press officer, science communicator and co-author of Why Space Will Freak You Out
Chandra X-ray Observatory
Episode: Space Stories - Let's Look at the Weirdest Corners of Space!
Jenifer Millard
Astronomy communicator and presenter known as Dr. Dust
Awesome Astronomy
Episode: Awesome Astronomy - The Nancy Grace Roman Space Telescope
Exodus Chun-Long Sit
Transmedia astronomy educator, popular science author, STEAM educator and science communicator
Starrix
Episode: AstroMan - G Is For Galileo
Karen Masters
Associate Professor of Physics and Astronomy at Haverford College
Haverford College
Episode: Awesome Astronomy - Extra: The Hubble Tuning Fork & Citizen Science
Dr. Al Grauer
Astronomy educator and guest on the program
Episode: Travelers in the Night Eps. 383 & 384: ET's Cigar & Dry Sands
André-Nicolas Chené
Assistant Astronomer at NOIRLab
NOIRLab
Episode: NOIRLab - First Magnetar Progenitor

Hosts

Fraser Cain
Astronomy communicator and publisher of Universe Today
Pamela L. Gay
Senior scientist at the Planetary Science Institute and astronomy communicator

Reviews

4.4 out of 5 stars from 599 ratings
  • Astronomy

    I thought this was about astronomy? I guess not.

    Apple Podcasts
    1
    horsepower man
    United States5 months ago
  • Gigling

    Stop the gigling!

    Apple Podcasts
    4
    Xanthan Gum
    Germany5 months ago
  • I don't care for all the tfake

    giggling and banter

    Podcast Addict
    1
    User1234
    10 months ago
  • Relaxing, Easy on the ears

    I love the story-telling feel to this podcast.

    Apple Podcasts
    5
    coolfactor
    Canadaa year ago
  • Unsubscribing Forever

    Pamela, please leave your political views out of a science podcast. You have lost a +5 year subscriber forever.

    Apple Podcasts
    1
    el_Bofo
    Canada2 years ago

Listeners Say

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

A few comments criticize host delivery, audio choices, or occasional language, despite appreciation for the subject matter.
Listeners value the breadth of coverage, from basic observing to complex topics such as theoretical physics and black holes.
Several listeners strongly dislike the loud intro and outro music, especially when listening to relax or fall asleep.
The varied contributors and storytelling format are praised for making astronomy informative and enjoyable.
Some listeners object to political commentary or personal asides in otherwise science-focused content.

Chart Rankings

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

Apple Podcasts
#8
United States/Science/Astronomy
Apple Podcasts
#112
United States/Science
Apple Podcasts
#11
United Kingdom/Science/Astronomy
Apple Podcasts
#11
Canada/Science/Astronomy
Apple Podcasts
#127
Canada/Science
Apple Podcasts
#155
United Kingdom/Science

Talking Points

Recent interactions between the hosts and their guests.

EVSN - Exposed Planetary Core Discovered & LIGO Reveals "Spooky Popcorn"
Q: How long does this flare last?
The flare began rising about 30 days after the LIGO trigger and lasted around 100 days, so observations could still catch it even if monitoring missed its start.
EVSN - Exposed Planetary Core Discovered & LIGO Reveals "Spooky Popcorn"
Q: Is there a limit to how big a black hole can get?
Graham says observed supermassive black holes reach roughly 10 billion solar masses, likely because the universe has not yet had time for enough mergers. He sees no known fundamental limit beyond the time and circumstances needed for mergers.
Guide To Space - Space Bites: Phobos or Bust! & "Impossible" Green Stars Are In Fact Real
Q: I'm very cynical about apps. Just because I don't pay for them or the content doesn't mean that there isn't a cost. What are the hidden costs of this Patreon app that Fraser keeps offering?
Cain explains that Patreon charges creators a share of their earnings, which he says is generally about five to ten percent, in exchange for handling payments, refunds, customer support, and hosting. He says the platform helps fund his work and lets supporters watch videos without ads, while acknowledging that Patreon is venture-capital funded and that he would leave if it became a bad deal.
Astronomy Cast Ep. 807: Mission Tech Series: Ion Drives
Q: Can you kind of explain the process?
Propellant gas enters a chamber, where an anode removes electrons to create ions. Electric and magnetic fields then direct and accelerate the ions out of the thruster, while a cathode neutralizer handles excess particles.
Astronomy Cast Ep. 807: Mission Tech Series: Ion Drives
Q: So why xenon?
Noble gases such as xenon do not readily react with surrounding materials, so they can be stored without corroding components or forming unwanted molecules. Their atoms can be ionized and accelerated to produce thrust.

Audience Metrics

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

Listeners per Episode
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Frequently Asked Questions About The 365 Days of Astronomy

What is The 365 Days of Astronomy about and what kind of topics does it cover?

Daily astronomy programming brings together a wide range of voices, from science communicators and researchers to amateur observers. Recurring contributors Fraser Cain and Pamela L. Gay explain space science, missions, and new discoveries, while other segments cover topics such as stargazing, asteroids, and the history and vocabulary of astronomy. The format varies: accessible explainers sit alongside news roundups, interviews, short stories, and practical observing conversations.

Coverage ranges from basic skywatching to technical subjects including black holes, propulsion, and gravitational waves, with an emphasis on making complex ideas understandable without losing scientific detail. Interviews often feature researchers and science com... more

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Which podcasts are similar to The 365 Days of Astronomy?

These podcasts share a similar audience with The 365 Days of Astronomy:

1. Universe Today Podcast
2. Astronomy Cast
3. SpaceTime with Stuart Gary
4. Space Nuts: Astronomy Insights & Cosmic Discoveries
5. Ask a Spaceman!

How many episodes of The 365 Days of Astronomy are there?

The 365 Days of Astronomy launched 18 years ago and published 300 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 The 365 Days of Astronomy?

Recent guests on The 365 Days of Astronomy include:

1. Paul M. Sutter
2. Matthew Graham
3. Kimberly K. Arcand
4. Megan Watzke
5. Jenifer Millard
6. Exodus Chun-Long Sit
7. Karen Masters
8. Dr. Al Grauer

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